Using Mendeleev's table, predict the formula, using subscripts to denote the number of each atom in the formula, for oxides of carbon ( C
C
) and aluminum ( Al
A
l
).

Answers

Answer 1

Mendeleev's periodic table allows us to predict the chemical properties of elements and their compounds. Let's start with oxides of carbon, which are compounds of carbon and oxygen.

Carbon can form two common oxides: carbon monoxide (CO) and carbon dioxide (CO2). In carbon monoxide, there is one carbon atom and one oxygen atom, so the formula would be written as CO with a subscript of 1 for carbon and a subscript of 1 for oxygen. In carbon dioxide, there is one carbon atom and two oxygen atoms, so the formula would be written as CO2 with a subscript of 1 for carbon and a subscript of 2 for oxygen.

Moving on to aluminum, it also forms oxides. The most common oxide of aluminum is aluminum oxide (Al2O3). In this compound, there are two aluminum atoms and three oxygen atoms. So the formula would be written as Al2O3 with a subscript of 2 for aluminum and a subscript of 3 for oxygen.
For more questions on: elements

https://brainly.com/question/18096867

#SPJ11


Related Questions

How would each of the following changes alter the equilibrium position of the system used to produce methanol from carbon monoxide and hydrogen?

CO(g) + 2H2 CH3OH(g) + heat

Answers

The equilibrium position of the system used to produce methanol from carbon monoxide and hydrogen can be altered by a change in the concentration of any of the reactants or products, a change in temperature, or a change in pressure.

If the concentration of carbon monoxide or hydrogen is increased, then the equilibrium position will shift to the right, favoring the formation of methanol. Conversely, if the concentration of methanol is increased, then the equilibrium position will shift to the left, favoring the decomposition of methanol into carbon monoxide and hydrogen.

If the temperature is increased, then the equilibrium position will shift to the right, as the forward reaction is exothermic and the reverse reaction is endothermic. Conversely, if the temperature is decreased, then the equilibrium position will shift to the left.

If the pressure is increased, then the equilibrium position will shift to the side with fewer moles of gas. In this case, both the reactants and the products have the same number of moles of gas, so the pressure will have no effect on the equilibrium position.

In summary, changes in concentration, temperature, and pressure can all alter the equilibrium position of the system used to produce methanol from carbon monoxide and hydrogen. By understanding how these changes affect the system, it is possible to manipulate the equilibrium position to maximize the yield of methanol.

To know more about carbon monoxide, visit:

https://brainly.com/question/22530423#

#SPJ11

Reactions of lithium with various oxidizing


agents have been examined for use in batteries. A particularly well studied case is that of the lithium-sulfur battery. What is the


potential that is possible for a battery that


operates on the reaction of Li(s) with S(s)?


The individual reduction potentials are given


here:


Li+ + eâ â Li E⦠= â3. 05 V


S + 2 eâ â S2â E⦠= â0. 48 V


Answer in units of V

Answers

The result is negative, this means the reaction is not spontaneous under standard conditions. In other words, a lithium-sulfur battery cannot be constructed under standard conditions.

To calculate the potential for the reaction of Li(s) with S(s), we need to use the reduction potentials and the Nernst equation:

Ecell = Ereduction(cathode) - Ereduction(anode)

where Ereduction is the reduction potential, cathode is the reduction half-reaction occurring at the cathode (where reduction occurs) and anode is the oxidation half-reaction occurring at the anode (where oxidation occurs).

In this case, Li(s) is the anode and S(s) is the cathode. So, we need to flip the sign of the reduction potential for the anode:

Ecell = E(S2-/S) - (-E(Li+/Li))

Ecell = 0.48 V - 3.05 V

Ecell = -2.57 V

To know more about lithium-sulfur battery refer to-

https://brainly.com/question/31104871

#SPJ11

Question 4 of 10


Which of these actions increases enthalpy in the air molecules of the Earth's


atmosphere?


A. Carbon dioxide being taken in by plants during photosynthesis


B. Trees being planted in the rain forests


C. People breathing in oxygen


D. The air being heated by the sun


SUBMIT

Answers

D, The air being heated by the sun.

Enthalpy is a measure of the internal energy of a system, including the potential and kinetic energy of its molecules. When the air is heated by the sun, the molecules in the air gain kinetic energy, which increases their enthalpy. This is because temperature is directly proportional to the kinetic energy of the molecules.

The other options listed, such as carbon dioxide being taken in by plants during photosynthesis, trees being planted in the rain forests, and people breathing in oxygen, do not directly increase the enthalpy of air molecules in the Earth's atmosphere. These processes may have other effects on the atmosphere, such as removing carbon dioxide or releasing oxygen, but they do not directly affect the internal energy or enthalpy of air molecules.

In summary, the correct answer to the question is D, the air being heated by the sun, as this process directly increases the enthalpy of air molecules in the Earth's atmosphere.

Know more about Enthalpy here:

https://brainly.com/question/16720480

#SPJ11

During a laboratory activity, a student places 21.0 mL of hydrochloric acid solution, HC1(ag),
of unknown concentration into a flask. The solution is titrated with 0.125 M NaOH(ag) until the
acid is exactly neutralized. The volume of NaH(ag) added is 18.5 milliliters. During this
laboratory activity, appropriate safety equipment is used and safety procedures are followed.

Answers

The presence of the ions in the HCl would make the solution to conduct electricity.

Why does HCl solution conduct electricity?

Because it separates into ions (H+ and Cl-) when hydrochloric acid is dissolved in water, HCl (hydrochloric acid) solution conducts electricity. The electric charge of the H+ and Cl- ions allows them to travel and convey current across the solution.

The dissociation constant (Ka) of HCl describes how much of the compound separates into ions depending on the concentration of the solution. A higher HCl concentration will produce more ions, which will increase conductivity.

Learn more about HCl:https://brainly.com/question/9004990

#SPJ1

whats the volume of dry hydrogen gas at standard astrospheric pressure

Answers

The volume of dry hydrogen gas at standard atmospheric pressure (which is typically defined as 1 atm or 101.325 kPa) depends on the number of moles of hydrogen gas present. The ideal gas law, PV = nRT, relates the pressure (P), volume (V), number of moles (n), and temperature (T) of an ideal gas. Assuming standard temperature and pressure (0°C and 1 atm), one mole of any ideal gas occupies a volume of 22.4 L. Therefore, to find the volume of dry hydrogen gas at standard atmospheric pressure, we need to know how many moles of hydrogen gas we have.

For example, if we have 1 mole of dry hydrogen gas at standard atmospheric pressure, the volume would be 22.4 L. If we have 0.5 moles of dry hydrogen gas, the volume would be 11.2 L. And so on.

The bulk of Florida’s peninsula is made up carbonate rock (limestone and dolostone) overlain by variable thicknesses and mixtures of sand and clay. Carbonate rocks store and transmit groundwater. Through a slow chemical process these carbonate rocks may also dissolve, which of the following landforms is a result of the chemical weathering of carbonate rock? A. dunes B. sinkholes C. mountains D. rivers

Answers

The landform that is a result of the chemical weathering of carbonate rock is

B. sinkholes.

What happens during chemical weathering of carbonate rock?

While the chemical weathering of carbonate rock does occur, it can result in voids or cavities under the surface. When sedimentary layers become unstable and unable to support their own weight, a concave impression known as a sinkhole will form.

Sinkholes are prevalent in areas that have an ample supply of carbonate rock, which itself poses a danger due to its potential impact on infrastructure and human well-being. It is important to note that the chemical deterioration of carbonate rock does not typically contribute to natural developments like mountains, dunes, or rivers.

Learn more about Sinkholes at

https://brainly.com/question/1856979

#SPJ1

Certain amounts of the hypothetical substances A2 and B are mixed in a 3. 00 liter container at 300. K. When equilibrium is established for the reaction the following amounts are present: 0. 200 mol of A2, 0. 400 mol of B, 0. 200 mol of D, and 0. 100 mol of E. What is Kp, the equilibrium constant in terms of partial pressures, for this reaction

Answers

To find the equilibrium constant in terms of partial pressures, we need to first write the balanced equation for the reaction and then determine the partial pressures of the gases at equilibrium.

Assuming the hypothetical reaction is:

A2 (g) + 2B (g) ⇌ 2C (g) + D (g) + E (g)

At equilibrium, the number of moles of each substance can be used to calculate the partial pressures using the ideal gas law:

PA2 = nA2 * RT / V = 0.200 mol * 0.0821 L·atm/(mol·K) * 300 K / 3.00 L = 4.10 atm

PB = nB * RT / V = 0.400 mol * 0.0821 L·atm/(mol·K) * 300 K / 3.00 L = 8.20 atm

PC = nC * RT / V = (0.200 mol / 2) * 0.0821 L·atm/(mol·K) * 300 K / 3.00 L = 2.05 atm

PD = 0.100 mol * 0.0821 L·atm/(mol·K) * 300 K / 3.00 L = 2.05 atm

PE = 0.200 mol * 0.0821 L·atm/(mol·K) * 300 K / 3.00 L = 4.10 atm

Kp can be calculated as the product of the partial pressures of the products, raised to their stoichiometric coefficients, divided by the product of the partial pressures of the reactants, raised to their stoichiometric coefficients:

Kp = (PC)^2 * (PD) * (PE) / (PA2) * (PB)^2

Kp = (2.05 atm)^2 * (2.05 atm) * (4.10 atm) / (4.10 atm) * (8.20 atm)^2

Kp = 0.0452 atm

Therefore, the equilibrium constant in terms of partial pressures (Kp) for this reaction is 0.0452 atm.

To know more about equilibrium refer here

https://brainly.com/question/14281439#

#SPJ11

Food web
wolf
rabbit
deer
plants
i
a student drew a basic food web of a forest ecosystem.
part a: describe what the arrows represent in the food web
part b: explain why the ecosystem supports fewer wolves than deer

Answers

Part a: The arrows in the food web represent the flow of energy and nutrients.

Part b: Ecosystem supports fewer wolves than deer because wolves are at a higher trophic level in food chain.

Part a: The movement of nutrients and energy from one organism to another is depicted by arrows in food chain. They specifically point to the direction of matter and energy transfer when one organism feeds another.

Part b: Due to wolves' higher trophic level in food chain, the ecology can only support a smaller population of them than deer. Due to energy loss from heat and metabolism, the amount of energy available at each level of the food chain diminishes as it progresses up the chain.

To know more about trophic level, here

brainly.com/question/13267084

#SPJ4

When 21.44 moles of si react with 17.62 moles of n2 how many moles of si3n4 are formed

Answers

A total of 11.48 moles of Si₃N₄ are formed.

To determine the moles of Si₃N₄ formed, we need to identify the limiting reactant. The balanced chemical equation is:

3Si + 2N₂ → Si₃N₄

First, find the mole ratio of Si to N₂ in the reaction:

Si: (21.44 moles Si) / 3 = 7.146
N₂: (17.62 moles N₂) / 2 = 8.810

Since the Si mole ratio is lower (7.146), Si is the limiting reactant. To calculate moles of Si₃N₄ formed, use the mole ratio from the balanced equation:

Moles of Si₃N₄ = (7.146 moles Si) * (1 mole Si₃N₄ / 3 moles Si) ≈ 11.48 moles Si₃N₄.

To know more about balanced chemical equation click on below link:

https://brainly.com/question/15052184#

#SPJ11

According to the law of conservation of mass, the total mass of the products of a chemical reaction should equal the total mass of the reactants. In our reaction on a balance, however, the mass went down, from 253. 0 g to 250. 2 grams. Using the given chemical equation, explain what caused the apparent loss of mass

Answers

The apparent loss of mass from 253.0 g to 250.2 g can be attributed to the involvement of a gas in the chemical reaction, either as a product or a reactant. This gas escapes the system during the reaction, causing a decrease in the observed mass, but the law of conservation of mass still holds true as the total mass is conserved in the reaction.

According to the law of conservation of mass, the total mass of the products of a chemical reaction should equal the total mass of the reactants. In your reaction, the mass went down from 253.0 g to 250.2 g, which seems to contradict this law. However, the apparent loss of mass can be explained by the involvement of a gas in the reaction.

Here's a step-by-step explanation:
1. Identify the given chemical equation. This will help in determining if a gas is produced or consumed in the reaction.
2. Examine the reactants and products to see if any of them are gases. Gases can escape the system during the reaction, causing a decrease in the observed mass.
3. If a gas is produced, this explains the apparent loss of mass. The mass of the gas is not being accounted for on the balance because it has escaped into the atmosphere.
4. If a gas is consumed, it may have been initially present in the system and was not measured in the initial mass. Once it is consumed, the mass of the system would appear to decrease.

In summary, the apparent loss of mass from 253.0 g to 250.2 g can be attributed to the involvement of a gas in the chemical reaction, either as a product or a reactant.

To know more about law of conservation of mass :

https://brainly.com/question/13600416

#SPJ11

How many grams of Barium Chloride are needed to make 220 mL of 0.040 M solution?

Answers

1.2 grams of Barium Chloride (BaCl₂) are needed to make 220 mL of 0.040 M solution.

How to find the mass

To determine the amount of grams of Barium Chloride (BaCl₂) needed to compound a 220 mL 0.040 M solution, we can implement the following formula:

mass (in grams) = molarity × volume (in liters) × molar mass

convert the volume of the mixture from milliliters (mL) to litres (L):

220 mL =  0.220 L by : 220/1000

The molar mass of BaCl₂ is 137.33 g/mo

Therefore, when utilizing the equation above, we can deduce that:

mass = 0.040 mol/L × 0.220 L × 137.33 g/mol = 1.2 g

Learn more about Barium Chloride at

https://brainly.com/question/29519054

#SPJ1

What type of reaction is A + B + 210 ) >>> C

Answers

The reaction A + B + 210 → C can be categorized as a combination reaction.

In a combination reaction, two or more reactants (A and B in this case) combine to form a single product (C). The number 210 could be a typo or an irrelevant part of the equation, as it does not fit the standard chemical notation.

Based on the information you provided, the reaction can still be categorized as a combination reaction. In a combination reaction, two or more reactants combine to form a single product.

In this case, reactants A and B react together to produce product C. However, without further information or a corrected equation, it is not possible to provide specific details about the reaction or the substances involved.

If you have any additional information or a revised equation, please provide it, and I would be happy to assist you further.

To learn more about reactants, refer below:

https://brainly.com/question/13005466

#SPJ11

1. For each of the following quantities, underline the zeros that are significant (sf), and determine the number of significant figures in each quantity. For (d) to (1), express each in exponential notation first. (a) 0. 0030 L (b) 0. 1044 g (c) 53,069 ml (d) 0. 00004715 m (e) 57,600 s (f) 0. 0000007160 cm (g) 57600​

Answers

0.0030 L - The significant figures are "3" and "0". There are two significant figures in this quantity.

0.1044 g - The significant figures are "1", "0", "4", and "4". There are four significant figures in this quantity.

53,069 mL - All digits are significant. There are five significant figures in this quantity.

0.00004715 m - In exponential notation, this is 4.715 x 10^-5 m. The significant figures are "4", "7", "1", and "5". There are four significant figures in this quantity.

57,600 s - The significant figures are "5", "7", and "6". There are three significant figures in this quantity.

0.0000007160 cm - In exponential notation, this is 7.160 x 10^-7 cm. The significant figures are "7", "1", "6", and "0". There are four significant figures in this quantity.

57600 - The significant figures are "5", "7", "6", and "0". There are three significant figures in this quantity.

Zeros at the beginning of a number are not significant, as they only indicate the decimal point's location. Trailing zeros after the decimal point are significant, as they indicate the precision of the measurement. However, trailing zeros before the decimal point are not significant, as they may be there only to indicate the scale of the number. In exponential notation, the number of significant figures is determined by the number of digits in the coefficient.

To know more about the Significant Figure, here

https://brainly.com/question/13061725

#SPJ4

which of these atoms has the most stable nuclei? Ra
Po
Rn
Au

Answers

Answer:

Rn has the most stable nucleus

Rn (Radon) has the most stable nuclei due to its closer proximity to the magic number 126.

Option (3) is correct.

The stability of a nucleus depends on the arrangement of protons and neutrons within it. Certain numbers of protons and neutrons result in more stable nuclei. These numbers are known as magic numbers, and they correspond to complete nuclear shells.

Among the given atoms:

Ra (Radium) has 88 protons and a varying number of neutrons.

Po (Polonium) has 84 protons and a varying number of neutrons.

Rn (Radon) has 86 protons and a varying number of neutrons.

Au (Gold) has 79 protons and a varying number of neutrons.

Radon (Rn) has the most stable nuclei because it is closer to the magic number 126 for neutrons. Elements with magic numbers of protons or neutrons tend to have more stable configurations, making Rn the most stable among the options provided.

To learn more about Rn (Radon)  here

https://brainly.com/question/28919596

#SPJ2

How many moles of n2 (g) are present in 1. 00 l of n2 (g) at 100. °c and 1 atm?


______ moles

Answers

There are 2.74 moles of N₂ (g) present in 1.00 L of N₂ (g) at 100°C and 1 atm.

The number of moles can be calculated using the ideal gas law, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

First, we need to convert the temperature from Celsius to Kelvin by adding 273.15 K. Thus, T = 100°C + 273.15 = 373.15 K .We also need to convert the pressure from atm to Pa by multiplying by 101,325 Pa/atm. Thus, P = 1 atm × 101,325 Pa/atm = 101,325 Pa.

We can now solve for n:

n = PV/RT = (101,325 Pa × 1.00 L)/(0.08206 L⋅atm/mol⋅K × 373.15 K) = 2.74 mol N₂ (g)

Therefore, in a 1.00 L container filled with N₂ (g) at a temperature of 100°C and pressure of 1 atm, there are 2.74 moles of N₂ (g) present

To know more about moles, refer here:

https://brainly.com/question/30759206#

#SPJ11

Explain with words how the parent nucleus changes in alpha decay?

Answers

In alpha decay, the nucleus emits an alpha particle or a helium nucleus. Alpha decay occurs in massive nuclei that have a large proton to neutron ratio. Alpha radiation minimizes the protons to neutrons ratio in the parent nucleus, thereby bringing it to a more stable configuration.

Was the solubility of kno3 affected by the higher water temperature in the same way the solubility of nh4cl was? explain.

Answers

The solubility of KNO3 increases with higher water temperatures, while the solubility of NH4Cl decreases as temperature rises.

The solubility of a substance in a solvent depends on several factors, including temperature, pressure, and the chemical properties of the substances involved. In the case of KNO3 and NH4Cl, their solubility is affected differently by temperature. KNO3 becomes more soluble as temperature increases, while NH4Cl becomes less soluble. This is because KNO3 has a weaker attraction to water molecules compared to NH4Cl, which results in a gradual increase in its solubility with temperature. On the other hand, NH4Cl has a stronger attraction to water molecules, and as temperature rises, the increased thermal energy causes the water molecules to move faster and disrupt the intermolecular forces that hold NH4Cl together, leading to a decrease in its solubility. Therefore, it is important to consider the unique properties and interactions of each compound with the solvent when predicting how changes in temperature will affect their solubility.

Know more about Solubility here:

https://brainly.com/question/31464655

#SPJ11

When magnesium chlorate (Mg(ClO3)2 is decomposed, oxygen gas and magnesium chloride are produced. What volume of oxygen gas at STP is produced when 3. 81 g of Mg(ClO3)2 decomposes?

Answers

The volume of oxygen gas produced when 3.81 g of Mg(ClO3)2 decomposes is 1.18 L at STP.

When magnesium chlorate (Mg(ClO3)2) is decomposed, it breaks down into oxygen gas (O2) and magnesium chloride (MgCl2). This reaction is an example of a decomposition reaction, which is a type of chemical reaction that involves the breakdown of a single compound into two or more simpler substances.

To determine the volume of oxygen gas produced when 3.81 g of Mg(ClO3)2 decomposes, we first need to calculate the number of moles of Mg(ClO3)2 in the sample. We can do this using the molar mass of Mg(ClO3)2, which is 214.2 g/mol:

Number of moles of Mg(ClO3)2 = mass / molar mass = 3.81 g / 214.2 g/mol = 0.0178 mol

Next, we need to use the balanced chemical equation for the decomposition of Mg(ClO3)2 to determine the number of moles of oxygen gas produced:

Mg(ClO3)2 -> MgCl2 + 3O2

According to this equation, for every mole of Mg(ClO3)2 that decomposes, three moles of oxygen gas are produced. Therefore, the number of moles of O2 produced in the reaction is:

Number of moles of O2 = 3 x number of moles of Mg(ClO3)2 = 3 x 0.0178 mol = 0.0534 mol

Finally, we can use the ideal gas law to calculate the volume of oxygen gas produced at STP (standard temperature and pressure, which are 0°C and 1 atm, respectively). The ideal gas law is given by:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant (0.08206 L atm/mol K), and T is the temperature in Kelvin.

At STP, the pressure is 1 atm and the temperature is 273 K. Therefore, we can rearrange the ideal gas law to solve for the volume:

V = nRT / P = (0.0534 mol) x (0.08206 L atm/mol K) x (273 K) / (1 atm) = 1.18 L

Therefore, the volume of oxygen gas produced when 3.81 g of Mg(ClO3)2 decomposes is 1.18 L at STP.

To know more about oxygen, visit:

https://brainly.com/question/13370320#

#SPJ11

A glucose solution in water is labelled as 20%. the density of the solution is 1.20 g/ml.
what is the molarity of the solution?

help your boy out

Answers

The molarity of the glucose solution is 6.66 M.

To determine the molarity of the glucose solution, we first need to convert the percentage concentration to grams of glucose per milliliter of solution.

Since the solution is labeled as 20%, we know that there are 20 grams of glucose in 100 milliliters of solution.

We can then use the density of the solution to convert from milliliters to grams:

1.20 g/mL x 100 mL = 120 g

So, there are 120 grams of glucose in the entire solution.

Now, we can calculate the number of moles of glucose using its molar mass, which is 180.16 g/mol:

moles of glucose = mass of glucose / molar mass = 120 g / 180.16 g/mol = 0.666 moles

Finally, we can calculate the molarity of the solution:

molarity = moles of solute / volume of solution in liters

We know that the volume of the solution is 100 mL or 0.1 L:

molarity = 0.666 moles / 0.1 L = 6.66 M

Therefore, the molarity of the glucose solution is 6.66 M.

To know more about molarity refer to-

https://brainly.com/question/8732513

#SPJ11

Dalton's Law and the Ideal Gas Law


At what pressure will 4. 80 moles of fluorine gas have a volume of 60. 0 liters and a temperature of 298 K?

Answers

The pressure of the fluorine gas under these conditions is approximately 2.01 atmospheres.

To answer your question, we will use the Ideal Gas Law equation:

PV = nRT

Where:
P = pressure
V = volume (60.0 liters)
n = number of moles (4.80 moles)
R = gas constant (0.0821 L atm / K mol)
T = temperature (298 K)

We need to find the pressure (P). Rearrange the equation for P:

P = nRT / V

Now plug in the given values:

P = (4.80 moles * 0.0821 L atm / K mol * 298 K) / 60.0 liters

P ≈ 2.01 atm

So, the pressure of the fluorine gas under these conditions is approximately 2.01 atmospheres.

To learn more about temperature, refer below:

https://brainly.com/question/11464844

#SPJ11

2al + 6 hcl → 2 alcl3 + 3h2 ∆hrxn = -152 kj

how much heat energy is associated with the reaction of 35 g of aluminum with excess hydrochloric acid?

Answers

The heat energy associated with the reaction of 35g of aluminum with excess hydrochloric acid is -5,380 kJ. This is calculated by multiplying the number of moles of aluminum (0.2 mol) by the enthalpy change of the reaction (-152 kJ/mol) to give -30.4 kJ.

This is then multiplied by the mass of aluminum (35g) to give -5,380 kJ.

In this reaction, heat energy is released as a result of the formation of bonds between the aluminum and the hydrochloric acid.

This means that the enthalpy change is negative, indicating that the reaction is exothermic. The reaction can be represented by the equation 2Al + 6HCl → 2AlCl3 + 3H2, with an enthalpy change of -152 kJ/mol.

Know more about Hydrochloric acid here

https://brainly.com/question/15231576#

#SPJ11

A student is holding a test tube containing 5.0 milliliters of water. A sample of NH4Cl(s) is placed
in the test tube and stirred. Describe the heat flow between the test tube and the student's hand.

Answers

Answer:

When NH4Cl(s) is added to water, it dissolves and dissociates into its constituent ions NH4+ and Cl-. This is an endothermic process, meaning it requires heat energy to occur. The NH4Cl(s) absorbs heat from the surroundings, including the water in the test tube and the student's hand holding the test tube. As a result, the test tube and the student's hand feel cooler, as some of the heat energy has been transferred to the NH4Cl(s). Therefore, the heat flows from the test tube and the student's hand to the NH4Cl(s).

The Goodyear Blimp has a volume of 5. 74 x 10e6 L. If it was also filled with hydrogen, how many moles of hydrogen would fit into the blimp?

Answers

The Goodyear Blimp filled with hydrogen can hold approximately 255,447.62 moles of hydrogen.

To find the number of moles of hydrogen that would fit into the blimp, we first need to calculate the mass of hydrogen that the blimp can hold.

The molar mass of hydrogen is 2.016 g/mol.

To calculate the mass of hydrogen that the blimp can hold, we multiply the volume of the blimp (5.74 x 10^6 L) by the density of hydrogen at standard temperature and pressure (STP), which is 0.0899 g/L:

Mass of hydrogen = volume of blimp x density of hydrogen at STP
Mass of hydrogen = 5.74 x 10^6 L x 0.0899 g/L
Mass of hydrogen = 515,026 g

Now, we can calculate the number of moles of hydrogen by dividing the mass of hydrogen by its molar mass:

Number of moles of hydrogen = mass of hydrogen / molar mass of hydrogen
Number of moles of hydrogen = 515,026 g / 2.016 g/mol
Number of moles of hydrogen = 255,447.62 mol

So, approximately 255,447.62 moles of hydrogen would fit into the Goodyear Blimp under standard temperature and pressure conditions.

Learn more about moles at https://brainly.com/question/29367909

#SPJ11

I NEED HELP ASAP PLEASE HELP!!!

1)Calculate the pH of a 0. 03 M solution of nitric acid.

2)Calculate the hydronium ion concentration of a sulfuric acid solution with a pH of 5. 43.

3)Calculate the pOH of a 0. 025 M solution of sodium hydroxide.

4)Calculate the pH of a 0. 002 M solution of lithium hydroxide

Answers

1) The pH of a 0.03 M solution of nitric acid can be calculated using the formula:

pH = -log[H+]

where [H+] is the concentration of hydronium ions in the solution.

Since nitric acid is a strong acid, it completely dissociates in water to form H+ ions and NO3- ions. Therefore, the concentration of H+ ions in a 0.03 M solution of nitric acid is also 0.03 M.

Substituting this value into the formula, we get:

pH = -log(0.03) ≈ 1.52

Therefore, the pH of a 0.03 M solution of nitric acid is approximately 1.52.

2) The hydronium ion concentration of a sulfuric acid solution with a pH of 5.43 can be calculated using the formula:

pH = -log[H+]

where [H+] is the concentration of hydronium ions in the solution.

Substituting the given pH value into the formula, we get:

5.43 = -log[H+]

Taking the antilogarithm of both sides, we get:

[H+] = 10^(-5.43)

[H+] ≈ 2.15 x 10^(-6) M

Therefore, the hydronium ion concentration of the sulfuric acid solution is approximately 2.15 x 10^(-6) M.

3) The pOH of a 0.025 M solution of sodium hydroxide can be calculated using the formula:

pOH = -log[OH-]

where [OH-] is the concentration of hydroxide ions in the solution.

Since sodium hydroxide is a strong base, it completely dissociates in water to form Na+ ions and OH- ions. Therefore, the concentration of OH- ions in a 0.025 M solution of sodium hydroxide is also 0.025 M.

Substituting this value into the formula, we get:

pOH = -log(0.025) ≈ 1.60

Since pH + pOH = 14, we can calculate the pH of the solution as:

pH = 14 - pOH = 14 - 1.60 ≈ 12.40

Therefore, the pH of a 0.025 M solution of sodium hydroxide is approximately 12.40.

4) The pH of a 0.002 M solution of lithium hydroxide can be calculated using the formula:

pH = 14 - pOH

where pOH is the negative logarithm of the hydroxide ion concentration [OH-].

Since lithium hydroxide is a strong base, it completely dissociates in water to form Li+ ions and OH- ions. Therefore, the concentration of OH- ions in a 0.002 M solution of lithium hydroxide is also 0.002 M.

Substituting this value into the formula, we get:

pOH = -log(0.002) ≈ 2.70

Therefore, the pH of a 0.002 M solution of lithium hydroxide is approximately:

pH = 14 - pOH = 14 - 2.70 ≈ 11.30

What is the percentage composition of each element in dinitrogen monoxide, n2o? (5 points) a 58.32% n; 41.68% o b 60.55% n; 39.45% o c 63.64% n; 36.36% o d 62.66% n; 37.34% o

Answers

The percentage composition of each element in dinitrogen monoxide is 63.64% N; 36.36% O.

To determine the percentage composition of each element in dinitrogen monoxide (N2O), we need to calculate the molar mass of the compound and the molar mass of each element.

Molar mass of N2O = (2 x molar mass of N) + molar mass of O

= (2 x 14.01 g/mol) + 16.00 g/mol

= 44.02 g/mol

The percentage composition of each element can be calculated as follows:

Percentage composition of N = (2 x molar mass of N) / molar mass of N2O x 100%

= (2 x 14.01 g/mol) / 44.02 g/mol x 100%

= 63.64%

Percentage composition of O = molar mass of O / molar mass of N2O x 100%

= 16.00 g/mol / 44.02 g/mol x 100%

= 36.36%

Therefore, the correct answer is option c: 63.64% N; 36.36% O.

Know more about Percentage composition here:

https://brainly.com/question/11952337

#SPJ11

During a synthesis reaction, 3. 2 grams of magnesium reacted with 12. 0 grams of oxygen. What is the maximum amount of magnesium oxide that can be produce during the reaction

Answers

The maximum amount of magnesium oxide that can be produced during the synthesis reaction between 3.2 grams of magnesium and 12.0 grams of oxygen is 14.4 grams.

This is because the amount of product produced in a synthesis reaction is limited by the amount of the reactant with the lowest mass. In this case, the reactant with the lowest mass is the 3.2 grams of magnesium, so the maximum amount of magnesium oxide that can be produced is 3.2 grams of magnesium multiplied by the mole ratio of magnesium oxide to magnesium, which is 1:1, resulting in 3.2 grams of magnesium oxide.

Therefore, the maximum amount of magnesium oxide that can be produced during the reaction is 14.4 grams (3.2 grams of magnesium multiplied by 4.5 grams of oxygen, which is the mole ratio for magnesium oxide to oxygen).

This is due to the Law of Conservation of Mass, which states that mass is neither created nor destroyed during a chemical reaction, only rearranged.

Know more about Synthesis reaction  here

https://brainly.com/question/16987748#

#SPJ11

Hematite and magnetite are important ore minerals of ________ found in ________. A. Zinc, hydrothermal deposits b. Iron, banded iron formation (BIF) c. Copper, secondary enrichment deposits d. Aluminum, placer deposits

Answers

Hematite and magnetite are important ore minerals of iron found in banded iron formations (BIF), option B is correct.

Iron is one of the most abundant elements in the Earth's crust and is an essential component of many industrial and technological applications. Hematite (Fe₂O₃) and magnetite (Fe₃O₄) are two of the most important iron ore minerals, both of which are found in banded iron formations (BIFs).

BIFs are sedimentary rocks that were formed billions of years ago and consist of alternating layers of iron oxides (hematite or magnetite) and silica-rich chert. These formations were formed when the Earth's oceans contained high levels of dissolved iron, which reacted with oxygen produced by photosynthetic organisms to form iron oxide minerals, option B is correct.

To learn more about Hematite follow the link:

brainly.com/question/11375983

#SPJ4

The complete question is:

Hematite and magnetite are important ore minerals of ________ found in ________.

A. Zinc, hydrothermal deposits

B. Iron, banded iron formation (BIF)

C. Copper, secondary enrichment deposits

D. Aluminum, placer deposits

If the pressure of a 7. 2 liter sample of gas changes from 735 mmHg to 800 mmHg and the temperature remains constant, what is the new volume of


gas?


06. 62 L


оооо


0 5. 9 L


0 7. 2L

Answers

The new volume of the gas is approximately 6.62 L.

To find the new volume of the gas when the pressure changes from 735 mmHg to 800 mmHg and the temperature remains constant, we can use Boyle's Law, which states that the product of pressure and volume is constant for a given amount of gas at a constant temperature. In mathematical terms, this is represented as:
P₁V₁ = P₂V₂

where P₁ and V₁ are the initial pressure and volume, and P₂ and V₂ are the final pressure and volume.

Given the initial conditions:
P₁ = 735 mmHg
V₁ = 7.2 L
P₂ = 800 mmHg

We want to find V₂. Rearrange the equation to solve for V₂:
V₂ = (P₁V₁) / P₂

Now, plug in the values:

V₂ = (735 mmHg × 7.2 L) / 800 mmHg
V₂ = 5268 / 800
V₂ ≈ 6.585 L

Among the given options, the closest answer to 6.585 L is 6.62 L. Therefore, the new volume of the gas is approximately 6.62 L.

To know more about Boyle's Law :

https://brainly.com/question/1437490

#SPJ11

In the reaction of h2 with cl2, the molecular bonds of the reactants are broken and new bonds are formed to make the products. what step(s) is/are considered endothermic?

steps:_

Answers

The breaking of the molecular bonds in H₂ and Cl₂ is considered an endothermic step because it requires energy input to break the bonds.

This energy is absorbed from the surroundings in the form of heat. On the other hand, the formation of new bonds between H and Cl atoms in the products is considered an exothermic step because it releases energy in the form of heat.

Overall, the reaction of H₂ with Cl₂ is an exothermic reaction because the energy released during the formation of new bonds is greater than the energy required to break the existing bonds. This means that the reaction releases heat into the surroundings.

To know more about exothermic reaction click on below link:

https://brainly.com/question/29206227#

#SPJ11

A 65 L gas cylinder containing gas at a pressure of 3. 6 x10^3 kPa and a temperature of 10°C springs a leak in a room at SATP. If the room has a volume of 108 m^3, will the gas displace all of the air in the room? ( 1m3 = 1000 L)

Answers

The volume of the gas in the cylinder is less than the volume of the room, the gas will not displace all the air in the room.

To determine whether the gas will displace all the air in the room, we need to compare the volume of the gas in the cylinder to the volume of the room.

First, we need to convert the volume of the gas cylinder from liters to cubic meters:

V_cylinder = 65 L = 0.065 m^3

Next, we can use the ideal gas law to calculate the number of moles of gas in the cylinder:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

Rearranging this equation,

n = PV/RT

where P, V, and T are the initial conditions of the gas in the cylinder.

n = (3.6 × 10^3 kPa)(0.065 m^3)/(8.31 J/(mol K) × 283 K) ≈ 0.89 mol

Next, we can use the volume of one mole of gas at SATP (i.e., 24.8 L/mol) to calculate the volume of gas that was initially in the cylinder:

V_initial = n × 24.8 L/mol ≈ 22.1 L

Since the volume of the gas in the cylinder is less than the volume of the room, the gas will not displace all the air in the room.

To know more about  volume of the gas refer here:

https://brainly.com/question/1984369

#SPJ11

Other Questions
There are 8 blue marbles, 6 red marbles, 2 green marbles and 4 black marbles in a box.What is the probability that the marble is not green? The base of an isosceles triangle is 6 cm and its area is 12 cm. What is the perimeter? Read the sentence. The drought-ridden ground gratefully drank in the rain. Which type of figurative language does this sentence contain? personification hyperbole meiosis onomatopoeia in a two-slit experiment, monochromatic coherent light of wavelength 600 nm passes through a pair of slits separated by 2.20 x 10-5 m. at what angle away from the centerline does the first bright fringe occur? Please help with this question. I am offering 40 points. You can use the word box above to answer the questions. volume of cylinders When he was 30, Kearney began investing $200 per month in various securities for his retirement savings. His investments averaged a 5. 5% annual rate of return until he retired at age 68. What was the value of Kearney's retirement savings when he retired? Assume monthly compounding of interest When streaming services began to produce their own films and series, a movement began to prevent these films from being eligible for prestigious industry awards, like the Oscars. What is this an example of?A. framingB. mass mediaC. gatekeepingD. media dependence theory Look at this image of the Victoria Terminus, a railway station in Mumbai,India. This building is an example of what kind of architecture?A. IslamicB. GreekC. BritishD. Japanese Drag each tile to the correct location, Determine the type of fee that will be charged In each situation. Joanne's brokerage firm charged her for providing investment information to help her make informed choices. Pete isn't a regular investor. He hasn't bought or sold any stock this year. His broker charged him an inacovity fee of $75 for the year. John's broker provided him with stock-trading software to manage his trading Lisa sold 50 shares of stock A on a given day. Her broker charged her $12 for this trade Reggie's broker charged him a front-end load of 2. 75% when he purchased a fund. Transaction Fee Non-transaction Fee 2021 Edmentum All rights reserved. You want to estimate the number of people in a grocery store who buy milk. which sample is unbiased?group of answer choices70 shoppers at random as they leave the store8 shoppers as they enter the store60 women with children at random80 shoppers in the dairy section at random HELP PLS SHOW WORKWest Fremont is a community consisting of 3,000 homes. A small coal-burning power plant currently supplies electricity for the town. The capacity of the power plant is 12 megawatts (MW) and the average household consumes 8,000 kilowatt hours (kWh) of electrical energy each year. The price paid to the electric utility by West Fremont residents for the energy is $0. 10 per kWh. The town leaders are considering a plan, the West Fremont Wind Project (WFWP), to generate their own electricity using 10 wind turbines that would be located on the wooded ridges surrounding the town. Each wind turbine would have a capacity of 1.2 MW and each would cost the town $3 million to purchase, finance, and operate for 25 years.(c) Assuming that the electrical energy needs of the community do not change during the 25-year lifetime of the wind turbines, what would be the cost to the community of the electricity supplied by the WWP over 25 years? Express your answer in dollars/kWh. Economics NCS Topic Test No 5. Perfect Market 1.3. Give ONE term for each of the following descriptions. Write uonly the term next to the question numbers (1.3.1 to 1.3.5) in the ANSWER BOOK. Abbreviations, acronyms and examples will NOT be accepted. 1.3.1 Actual expenditure of business such as wages and interest 1.3.2 The cost that changes as more or less outputs are produced 1.3.3 An institution that can make final decisions by reviewing the decisions of the competition commission and Tribunal. 1.3.4 A word that describe the characteristics of differentiated product in oligopoly or monopolistic competition. 1.3.5 A period when inputs or factors of production are fixed. (5x1) (5) TOTAL SECTION A: [201 que canciones de reggeton tienen aliteracion? (25 POINTS!!!) A) Choose two examples from the following areas and explain how they are evidence of globalization. Provide an example from each category. International trade organizationsImmigrationNew technologiesB) Explain one major positive effect and one negative effect of globalization on the United States. pls do both parts! i'd do it on my own but i don't have the book :( A student went for a short run to investigate the effect of physical activity on his pulse rate. The resting pulse rate for the student was 60 beats per minute and during exercise his pulse rateincreased to 144 beats per minute. Calculate the percentage increase in pulse rate I should like to rise and goWhere the golden apples grow;Where below another skyParrot islands anchored lie,And, watched by cockatoos and goats,Lonely Crusoes building boats;Where in sunshine reaching outEastern cities, miles about,Are with mosque and minaretAmong sandy gardens set,And the rich goods from near and farHang for sale in the bazaar,Where the Great Wall round China goes,And on one side the desert blows,And with bell and voice and drumCities on the other hum;Where are forests, hot as fire,Wide as England, tall as a spire,Full of apes and cocoa-nutsAnd the negro hunters huts;Where the knotty crocodileLies and blinks in the Nile,And the red flamingo fliesHunting fish before his eyes;Where in jungles, near and far,Man-devouring tigers are,Lying close and giving earLest the hunt be drawing near,Or a comer-by be seenSwinging in a palanquin;Where among the desert sandsSome deserted city stands,All its children, sweep and prince,Grown to manhood ages since,Not a foot in street or house,Not a stir of child or mouse,And when kindly falls the night,In all the town no spark of light.There Ill come when Im a manWith a camel caravan;Light a fire in the gloomOf some dusty dining-room;See the pictures on the walls,Heroes, fights and festivals;And in a corner find the toysOf the old Egyptian boys.In the poem, Travel, what is the point of view of the speaker? apeople who cannot travel lead unfulfilling lives bolder people do not have time to travel cThe speaker is a child with an active imagination about exotic travel experiences dThe speaker is a foolish child The poet locates phrases that seem to portray hatred positively- such as ""it knows how to make beauty"" (line 35)- near details that show how hatred triggers destruction. What message about hatred is the poet conveying through this juxtaposition? Mei is extremely upset because she has been falsely accused of stealing money from her employer. Her lawyer has suggested that mei take a polygraph test to prove her innocence. She asks you wheather she should agree to the test. Based on the research into the accuracy of polygraphs, you should tell mei that polygraphs:. A velociraptor runs 5m [E] , 10 m [W], 3m [S], & 2m [W] in 10 seconds. Calculate speed & velocity