I’ll give 20 points if you say right
This is about moles
-How heavy is the reaction?
-I will name you brainliest if answer is right

Answer:

damming rivers for hydroelectricity, using water for farming, deforestation and the burning of fossil fuels.

Explanation:

Answer:

Two atoms (O2)

Explanation:

Atmospheric oxygen molecule has 2 atoms, which can be easily seen from the oxygen symbol - O2. Here, the molecule has two atoms of oxygen.

Answer:

gamma decay.

Explanation:

A gamma decay emits only a gamma-ray photon,

While a certain isotope decays, it emits photons.It is a type of gamma decay.

Isotopes are defined as substances having same number of protons but different number of neutrons.Number of protons is characteristic for determining position of elements in the periodic table.

Since,all isotopes have the same number of protons and hence have same position.They have similar chemical properties as they have same number of electrons.

They find applications in the field of nuclear medicine and oil and gas research . There are 2 types of isotopes : stable and unstable

Unstable isotopes are radioactive and are called as radioisotopes.Some of these isotopes are man -made and hence also called as artificial isotopes.Every element has an isotope which is either man-made or natural .

Many properties of isotopes depend on mass which is measured in atomic mass unit. The difference in actual mass and mass number is called mass defect.

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Explanation:

Molarity = mol/L or g/L

Data:

Mass>80.0g

Mr of CaCl2>111.1g/mol

V>500mL

Convert mL to Litres;. mole=g/Mr

1L=1000mL. =80g/111.1g/mol

x=500mL. =0.720072007mol

x=0.5L

Molarity= mole/volume

=0.720072007mol/0.5L

=1.440144014mol/L

=1.4401mol/L

Hope this helps. Depending on the question you can also find it in g/L but mol/L is safer.

Answer:

c

Explanation:

H3C•O=(c•CH3 can interact with other like molecules through only only dispersion forces and dipole dipole forces. option B is correct.

The force of dipole dipole creates because of the presence of polar compounds and they are responsible for the polarization too and dispersion forces are weak molecular forces of interaction.

H3C•O=(c•CH3 is known as acetone and due to the presence of oxygen they form one polar bond due to the presence of lone pair on the oxygen atom and oxygen is the electronegative element too.

Acetone will form dispersion force as carbon and hydrogen are of similar electronegativities so they are bounded with dispersion force and not very polar.

Therefore, H3C•O=(c•CH3 can interact with other like molecules through only only dispersion forces and dipole dipole forces. option B is correct.

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The reactions involved are synthesis, combustion and single replacement reactions and the masses of products formed are dependent on the mole ratio.

Limiting reactants are reactants are reactants that are used in a chemical reaction.

The equation for the production of water is given below:

[tex]2H_2 + O_2 \rightarrow 2H_2O[/tex]

The reaction is a synthesis reaction and the mole ratio of hydrogen to oxygen is 2 : 1.

Moles of 250 g of Hydrogen = 250/2 = 125 moles

Moles of water produced = 125 moles

Mass of water = 125 × 18 = 2250 g

Moles of oxygen in 250 g = 250/32 = 7.81 moles

Moles of water produced = 7.81 × 2 = 15.62

Mass of water produced = 15.62 × 18 = 281.16 g

Since moles of oxygen use is less than the mole ratio of reaction, oxygen is the limiting reactant.

2. The reaction of propane and oxygen is a combustion reaction and is given below:

[tex]C_3H_8 + 5O_2 \rightarrow 3CO_2 + 4H_2O[/tex]

1 mole of propane produces 4 moles of water

44 g of propane produces 72 g of water

Mass of propane required to produce 1000 g of water = 1000 × 44/ 72 = 611.1 g of propane

3. The reaction of zinc and hydrochloride acid is a single replacement reaction and the equation is given below:

[tex]Zn + 2HCl \rightarrow ZnCl_2 + H_2[/tex]

1 mole of Zn and 2 moles of HCl are required to produce 1 mole of hydrogen gas

Molar mass of Zn = 65 g

Molar mass of HCl = 36.5

Molar mass of hydrogen = 2.0 g

150 g of Hydrogen gas = 150/2 = 75 moles of hydrogen

Mass of 75 moles of Zn = 75 × 65 = 4875 g

mass of 75 × 2 moles if HCl = 150 × 36.5 =5475 g

Therefore, 4875 g of Zn and 5475 g of HCl are required to produce 150 g of Hydrogen gas.

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Answer:

6s

Explanation:

Barium is in group 2 of the s block and is in period 6.

Barium belongs to the s block's period 6 and group 2. Barium is an alkaline earth metal with two valence electrons and a (+2) oxidation state found in Periodic Table Group 2.

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Answer:

5.16 gm of SO3 formed with 2 g of S

Explanation:

Mole weight of  S in the equation = 2 * 32 = 62 gm

Mole weight os   O2  in the equation  6 * 16 =96 gm

From the BALANCED  equation   the grams of   S  to   O2  is

    62   to 96   so    2 g of  S will need  approx 3 gm of O2

            this shows that S is the limiting reactant------>

                            there will be O left over  (approx 1 gram)

SO3 mole weight produced from the equation is   2 (32)(3*16) = 160 gm

  62 gm of S produces 160 gm of SO3

   62/160 =  2 / x       x = 5.16 gm of  SO3   are formed

The final temperature of the nitrogen gas is equal to 23.5 °C.

The ideal gas equation describes the behavior of the state of a perfect gas. This equation defined that the product of the pressure and volume is equal to the product of the moles and absolute temperature of the gas.

The ideal gas equation can be expressed as shown below:

PV = nRT

Where n is the moles, V is the volume, R is the gas constant and T is the temperature.

Given, the temperature of nitrogen gas, T₁ =  17° C = 273 + 17 = 290 K

The pressure of the nitrogen gas, P₁ = 737 mmHg = 1.03 atm

The volume of the gas, V₁ = 26.5 ml = 0.0265 L

The pressure of the nitrogen gas, P₂ = 737 mmHg = 1.03 atm

The volume of the gas, V₂ = 27.1 ml = 0.0271 L

(P₁V₁)/T₁ = (P₂V₂)/T₂

[tex]{\displaystyle T_2 =\frac{P_2V_2T_1}{P_1V_1}[/tex]

[tex]{\displaystyle T_2 =\frac{1.03\times 0.0271\times290}{1.03\times 0.0265}[/tex]

T₂ = 296.5 K

T₂ = 296.5 -273 = 23.5 °C

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Answer:

HCl → H+ + Cl-

pH = -log[H+] = 1.469

Explanation:

Strong acid doesn't establish equilibrium. To determine the pH of a strong acid, the concentration of the acid is equal to the concentration of the hydrogen ion, so take the -log[H+], which will give you the pH. And you can see that it is a small number, and that's because HCl is a strong acid.

The pH of a solution can be calculated using the equation: pH = -log[H+]

pH is a measure of the acidity or alkalinity of a solution. It is a scale that ranges from 0 to 14, with 7 being considered neutral. A pH value below 7 indicates acidity, while a pH value above 7 indicates alkalinity.

In this case, the HCl solution has a concentration of 0.0340 M, which represents the concentration of H+ ions. Since HCl is a strong acid, it completely dissociates in water, yielding one H+ ion for every HCl molecule.

Therefore, the concentration of H+ ions is equal to the concentration of the HCl solution, which is 0.0340 M.

Taking the negative logarithm of 0.0340, we have:

pH = -log(0.0340)

Using a calculator, we find that the pH of the 0.0340 M HCl solution is approximately 1.47.

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DISTURBANCE in carbon dioxide in your tissues leads to CHANGE in pH of cerebrospinal fluid and blood, which ultimately causes your breathing to speed up.

The carbondioxide in the tissues are transported in the blood from the bodily tissues to the lungs through binding to hemoglobin or as a bicarbonate ion. the disturbance of CO₂ in the tissues will lead to a change in the pH level of the cerebrospinal fluid which leads to an increase in breathing speed.

Hence we can conclude that Disturbance in carbon dioxide in your tissues leads to Change in pH of cerebrospinal fluid and blood, which ultimately causes your breathing to speed up.

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Answer:

B. Greenhouse gases are released into the atmosphere.

I learn it in my bio class

As the volume was decreased and pressure increased to the given values, the new temperature of the ideal gas is 226.9°C.

Combined gas law put together both Boyle's Law, Charles's Law, and Gay-Lussac's Law. It states that "the ratio of the product of volume and pressure and the absolute temperature of a gas is equal to a constant.

It is expressed as;

P₁V₁/T₁ = P₂V₂/T₂

Given the data in the question;

To calculate the new temperature the gas, we subtsitute our given values into the expression above.

P₁V₁/T₁ = P₂V₂/T₂

P₁V₁T₂ = P₂V₂T₁

T₂ = P₂V₂T₁/P₁V₁

T₂ = ( 4.00atm × 1.50L × 305.15K ) / ( 1.04605atm × 3.50L )

T₂ = 1830.9LatmK / 3.661175Latm

T₂ = 500.085K

T₂ = 226.9°C

Therefore, as the volume was decreased and pressure increased to the given values, the new temperature of the ideal gas is 226.9°C.

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The name of the compound by using the IUPAC nomenclature of organic compounds is 1 -octene. The correct option is the last option - 1-octene.

From the question, we are to determine the name of the given molecule.

To name the compound, we will follow the IUPAC rules.

Some of IUPAC rules are

The given compound has 8 carbons and a double bond. The root name of the compound is octane.

By IUPAC rules, the compound is an Octene.

Since the double bond is between carbon-1 and carbon-2. The compound becomes 1-octene.

Hence, the name of the compound by using the IUPAC nomenclature of organic compounds is 1 -octene. The correct option is the last option - 1-octene.

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The diagram for the compound is attached below.

Answer

Dmitri Mendeleev Explanation:The modern periodic tables is credited primarily to the russian chemist Dmitri Mendeleev. Mendeleev's table is based on the periodic law, which states that when elements are arranged in order of increasing mass, their properties recur periodically.

The both sturctures of the nucleic acid are called resonance structures.

Resonance structures refers to those structures that differ from each other by the position of electron pairs. We must state that resonsnce occurs in spsecies that have conjugated double bonds.

Hence, the both sturctures of the nucleic acid are called resonance structures.

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This is defined as a chemical substance which can react with a base to form a salt in a reaction.

The appropriate acid suffixes and conditions is however correctly given above.

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For a current of 15.0 A is passed through molten magnesium chloride for 15.0 hours, the amount of moles of magnesium metal   is mathematically given as

M=4.2mole

Generally, the equation for the Chemical reaction  is mathematically given as

Mg+2e---->Mg

Therefore

Charge=Currect*time

Q=15*5*4.0*10^4

Q=8.10*10^5C

In conclusion, the number of moles

8.10*10^5C*1M/(2*96500)

M=4.2mole

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Answer:

1.By reduction of acidified anions.

2.By weathering of rocks.

Explanation:

Answer:

2 or can be by reduction of acid anions

Answer:

Explanation:

Question

If 4.5 moles of H2O are produced how many moles of citric acid were used in this reaction

Answer:

See below ~

Explanation:

1. C. solid

2. B. tone quality

3. C. pitch

4. D. capable of producing its own light

5. D. stars

Answer:

1. C. solids

2. B. tone quality

3. A. pitch

4. D. capable of producing its own light

5. D. stars

Answer:

B. Atmospheric Pressure and Visibility

Explanation:

Latitude and Longitude are locations, not aspects of weather.

While dew point is an element, ground temperature is not measured.

Condensation regarding clouds might be measured but saturation more or less isn't. (Unless specifically humidity.

Atmospheric Pressure and Visibility are both elements of weather.

pH:-

It's acidic as pH<7

Now

The calculated population growth was zero indicating that the population had not net change.

The term "population" refers to the number of people or species residing in a certain area.

According to the question:

Four gorillas were born and one orphaned gorilla joined = 4 + 1 = 5

Two older gorillas died and three males left the population to find mates = 5 - 2 - 3 = 0

The population increase of gorillas was calculated to be zero, meaning that there was no net change in the population.

Hence population had not net change.

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Answer:

The calculated population growth was ZERO, indicating that the population HAD NO NET CHANGE.

Explanation: Got it right! Good luck guys!

Answer:

~Shoto todorki here~

The following table illustrates some of the factors that influence the strength of intermolecular attractions. The formula of each entry is followed by its formula weight in parentheses and the boiling point in degrees Celsius. First there is molecular size. Large molecules have more electrons and nuclei that create van der Waals attractive forces, so their compounds usually have higher boiling points than similar compounds made up of smaller molecules. It is very important to apply this rule only to like compounds.  (Hope this helps!)

Answer:

How do you think plants would grow in space? Which tropism(s) would be affected and why?

In the absence of gravity, plants use other environmental factors, such as light, to orient and guide growth. A bank of light emitting diodes (LEDs) above the plants produces a spectrum of light suited for the plants' growth. Enjoy don't  fail :)

Explanation:

In an ecosystem like space where there is no gravity, geotropism would be affected .

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Answer:

an acid is a proton (H⁺) donor, and a base is a proton acceptor.

Explanation:

hope this helps

pls mark brainliest

Answer: 0.065

Explanation:

Answer:

A.The relative humidity is higher at Harry’s school than at Roberta’s house.

Explanation:

Check using the Relative Humidity Table

Answer:

Option B) The relative humidity is higher at Roberta’s house than at Harry’s school.

Explanation:

got 100% on test