(a.) a 0.7549g sample of the compound burns in o2(g) to produce 1.9061g of co2(g) and 0.3370g of h2o(g).

A substance is held in an open container its particles move fast one another at random speeds but do not leave the container then When enough heat is removed, the particles no longer have enough speed to overcome the weak attractive forces between them

When more gas particles enter a container, there is less space for the particles to spread out, and they become compressed and the particles exert more force on the interior volume of the container and this force is called pressure and in gases the particles move rapidly in all directions, frequently colliding with each other and the side of the container with an increase in temperature, the particles gain kinetic energy and move faster and that's why in the open container particles moves fast one another and when enough heat is removed then the particles no longer have enough speed to overcome the weak attractive forces between them

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Ag^t + e^- ------> Ag

I = 2.48 A

t = 1430 s

q = It = 2.22×1180 = 3729.6

ne- = q/F = 3729.6/96485 = 0.03+

The mass percent is calculated by dividing the mass of the compound or solute by the mass of the element or solute. A percent is obtained by multiplying the result by 100. The mass percent formula is (mass of element in 1 mole of compound / mass of 1 mole of compound) x 100 to determine the amount of an element in a compound.

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John Dalton was born in a poor weaver's family in 1766 in England. He began his career as a teacher at the age of twelve. Seven years later he became a school principal. In 1793, Dalton left for Manchester to teach mathematics, physics and chemistry in a college. He spent most of his life there teaching and researching. In 1808, he presented his atomic theory which was a turning point in the study of matter.

According to Dalton's Atomic theory, all matter whether an element, a compound or a mixture is composed of small particles called atoms.

The postulates of this theory may be stated as follows:

Answer: https://homework.study.com/explanation/if-the-pk-a-values-for-phosphoric-acid-are-2-15-6-82-and-12-38-at-what-ph-would-one-observe-equal-amounts-of-h-2-po-4-and-hpo-4-2.html

Explanation:

website to the answer lol

Answer:

There are 1.0 * 10^9 seconds in 32 years.

Explanation:

To solve this problem, we will use dimensional analysis, or multiplying by fractions equivalent to 1.

We are starting with a value in years. Since we know that there are 365 days in 1 year, we can multiply the given value (in years) by 365 days/1 year to cancel out the units of years and convert to days:

32 years * 365 days/1 year = 11,680 days

Next, we can use the same idea to convert from days to hours:

11,680 days * 24 hours/1 day = 280,320 hours

And then again for hours to minutes and minutes to seconds:

280,320 hours * 60 minutes/1 hour * 60 seconds/1 minute

= 1009152000 seconds

This answer is quite large, so we will convert to scientific notation to make the value more manageable.

1009152000 seconds = 1.0 * 10^9 seconds

Therefore your answer is 1.0 * 10^9 seconds.

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Tetraborane(B₄H₁₀) has a mass of 2.21×10¯¹⁴ g and one billion (1×10⁹)  boron atoms.

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The procedure that cannot be performed on a hot plate, requiring a bunsen burner instead include A. Heating a crucible to remove water from a hydrate.

The procedure that can be performed on a hot plate are:

a. Heating a solvent to help a solute dissolve.

b. Heating an isolated solid to dry it.

c. Heating water to boiling for a water bath.

It should be emphasized that heating a crucible in order to extract water from a hydrate cannot be done using a hot plate. Anyone should avoid heating any ceramic or silica items on a hot plate.

The ideal solution is to heat a crucible to extract the water from a hydrate.

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Answer: One

Explanation: All elements have just one proton and one neutron

Answer:

3. J.J. Thomson & electron

4. b) nucleus

5. neutrons & protons

6. electrons

Answer:

yes

Explanation:

I can't think

Answer:

Li2O

Explanation:

Lithium is an alkali metal that has three protons and three electrons. Oxygen is a nonmetallic gas that has eight protons and eight electrons. Lithium and oxygen bond to form an ionic compound.

3Li : 1s2 2s1......Li+

8O : 1s2 2s2 2p4.....O2-

volume of carbon dioxide is produced in the first minute 0.56 L of CO₂

Salt, carbon dioxide, and water are produced when metal carbonate and an acid react. In order to create calcium chloride (CaCl2), carbon dioxide (CO2), and water, calcium carbonate (CaCO3) combines with hydrochloric acid (HCl) (H2O). We are aware that 22.4 L is the volume occupied by 1 mole of any gas at 0° C and 1 atm pressure.

Thus, 100 g of CaCO₃ produces 22.4 L of CO₂

So, 2.5 g CaCO₃ will form, which equals 100.

56 L of CO (2.5*22.4/100)

= 0.56 L of CO₂

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​

The average density measured by each group, and the percentage error in each average is 0.88 % , 1.18 % , - 1.77% .

Group 1 :

= d (trial 1 +2+3) / 3

= 12.7 + 11.32 + 10.3 / 3

= 11.4 g/ml

% error = [(E.V - T.V) / T.V ] x 100

  = [( 11.4 - 11.3 ) /11.3 ] x 100

  = 0.88 %

Group 2 :

d = A.J + 11.4 + 11.4/3

   = 11.43 g/ml

% error = 11.433 - 11.3 / 11.3 x 100

    = 1.18 %

Group 3 :

d = 10.9 + 11.3 + 11.1 / 3

  = 11.10 g/ml

% error = 11.10 - 11.3 / 11.3 x 100

   = - 1.77%

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I understand the question you are looking for :

handbook lists the density of lead as 11.3 gmL, Several groups of students are attempting to determine the density of a lead weight by various methods. Calculate the average density measured by each group. and the percentage error in each average. Measured densities (g/mL) Group [ Group 2 Group 3 Trial 12.7 113 10.9 Trial 2 11.2 114 11.3 Trial 3 10.3 114 11.1 average density of group 1: glmL percent error of group average density of group 2: glmL percent error of group 2: average density of group 3: glmL percent error of group 3: Which group was most accurate? Which group was most precise? group group 2 group group 3 group 3 group

Answer:43.12 KG = 43,120 grams

Explanation:1 kilogram is equal to 1,000 grams.

Answer:

43120 g

Explanation:

1 kg = 1000 g

43.12 = 1000(43.12) g

1000(43.12) = 43120

The unit is g because we are converting to grams, and the abbreviation for grams is g.

∴ 43.12 kg = 43120 g

The required amount of the dihydrate in the question is 71g of the dihydrate.

We know that a compound could have a water of crystallization. This water of crystallization is attached to the molecule of the compound and is involved when we are calculating the molar mass of the compound.

Now we have the mass  of the anhydrous compound that is required as 65 g.

Molar mass of the anhydrous compound = 391 g/mol

Molar mass of the dihydrate 427 g/mol

Given that;

Number of moles of hydrated compound = Number of moles of anhydrous compound

x/427 = 65/391

x = 65/391 * 427

x = 71 g

Thus, we would require 71g of the dihydrate.

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Answer:

element

Explanation:

its the only substance type of antom called the element so yeah

Answer:All have Chemical and Physical properties

Explanation:

After 24 days, you will have 1/2 kg

It's a common occurrence for radioactive isotopes to spontaneously decay over time, shedding their radioactive atoms. The period of time it takes for any sample of an element to be reduced to half its initial amount is known as the half-life of a radioactive isotope. The differential equation

dNdt=kN(t)

describes the decay of such radioactive isotopes, where N(t) is the number of radioactive atoms of the element that are still present at time t and k is the decay constant.

The solution to the aforementioned differential equation is N(t) = N (0)ekt, where N (0) is the initial sample's initial number of atoms.

Keep in mind that the natural logarithm has the identity

a ln n=a ln n.

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Answer:The answer is potassium.

The increasing order of basicity, putting least basic nitrogen atom first are as follow:

N2 < N1 < N3.

The basicity of the atom is inversely proportional to the resonance.

Resonance is also termed as mesomerism, is defined as a way of telling the bonding in certain polyatomic ions or molecules by the combination of varies contributing structures into the resonance hybrid in the valence bond theory.

Since, in N2 due to the presence of lone pair of electron and it not even donate these lone pair of electron. On the other hand they take part in resonance, therefore the basicity of the N2 is least.

In N3 the lone pair of electron is present and it able to donate these lone pair of electron to the sp3 hybridization, therefore the basicity of the N3 is more than N2.

Thus, we concluded that increasing order of basicity, putting least basic nitrogen atom first are N2 < N1 < N3.

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Answer:

intruducing nuclear in a country like nepal where the knowledge of nuclear science is limited is a major task.

Explanation:

(maybe it will help if not sorry because my answer is wrong)

Nepal is a landlocked country that has been facing challenges in meeting its energy demand. The country is heavily dependent on imported fossil fuels, which are expensive and have negative environmental impacts.

Nuclear energy is the energy that is released from the nucleus of an atom through a process called nuclear reaction. Nuclear reactions can occur spontaneously or can be induced by bombarding the nucleus with particles such as neutrons.

However, Nepal currently does not have any nuclear power plants, and the country has not developed any nuclear energy infrastructure. Therefore, the development of nuclear energy in Nepal would require significant investment in terms of time, money, and human resources. Additionally, there are concerns about the safety and security of nuclear energy, and these issues would need to be addressed before nuclear energy could be developed in Nepal.

Despite these challenges, there are some potential benefits to the development of nuclear energy in Nepal. Nuclear energy has the potential to provide a reliable source of energy that is not dependent on imported fossil fuels. Additionally, nuclear energy is a low-carbon source of energy that could help Nepal reduce its greenhouse gas emissions and mitigate the impacts of climate change.

In conclusion, the development of nuclear energy in Nepal is a complex issue that requires careful consideration of the potential benefits and risks. While nuclear energy could provide a reliable and low-carbon source of energy, there are significant challenges that would need to be addressed before nuclear energy could be developed in Nepal.

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According to the research, the correct option is B. They increase the OH- concentration in solution is a property of all bases.

It is the substance that has alkalinity that, when in solution, increases the concentration of hydroxyl ions (OH-) and establishes combinations with acids for the development of salts.

They are soluble in water and usually have a bitter taste and by providing hydroxyl ions to the medium, they are capable of neutralizing acids.

Therefore, we can conclude that according to the research, the correct option is B. They increase the OH- concentration in solution is a property of all bases.

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129 pounds of gasoline will it hold if the gasoline has a density of 0.737 g/ml.

Stoichiometry helps us use the balanced chemical equation to measures quantitative relationships and it is to calculate the amount of products and reactants that are given in a reaction.

Density is defined as mass per unit volume. S.I unit if density is kg/m³.

It is expressed as

Density = [tex]\frac{\text{Mass}}{\text{Volume}}[/tex]  or [tex]d = \frac{m}{V}[/tex]

Now,

= [tex]21.0\ \text{gallon} \times \frac{3.785\ L}{1\text{gallon}} \times \frac{1000\ mL}{1\ L} \times \frac{0.737\ g}{1\ mL} \times \frac{1\ kg}{1000\ g} \times \frac{2.2046\ \text{pounds}}{1\ kg}[/tex]

= [tex]\frac{21.0 \times 3.785 \times 1000 \times 0.737 \times 2.2046}{1 \times 1 \times 1000 \times 1}\ \text{pounds}[/tex]

= 129 pounds.

Thus from the above conclusion we can say that 129 pounds of gasoline will it hold if the gasoline has a density of 0.737 g/ml.

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The amount of water that should be added to 28 ml of 15​% alcohol solution to reduce the concentration to ​14% is: 2 ml

To solve this problem, the formula and the procedure that we have to use is:

c1 * v1 = c2 * v2

Where:

Information about the problem:

Applying the dissolution of concentrations formula and clearing the volume of the diluted solution (v2) we get:

c1 * v1 = c2 * v2

v2 = (c1 * v1)/ c2

v2 = (15% * 28 ml)/ 14%

v2= 30 ml

In order to know how much water should be added we have to subtract 28 ml from the volume of the diluted solution:

amount of water should be added = v2 - v1

amount of water should be added = 30 ml - 28 ml

amount of water should be added = 2 ml

In chemistry a solution is known as a homogeneous mixture of two or more components called:

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Magnesium potassium phosphate hexahydrate and a number of its deuterated counterparts were studied for their Fourier transform infrared and Raman spectra. By contrasting the spectra obtained at the boiling point of liquid nitrogen with those obtained at ambient temperature and by examining the spectra of a succession of partially deuterated MgKPO4

Raman and infrared spectroscopy both investigate how radiation interacts with molecular vibrations, but they do so in different ways depending on how the photon energy is delivered to the molecule by altering its vibrational state.

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When pol filled another test tube to the top, the liquid formed a low dome, which is evidence of cohesion.

The dome-like shape forms some properties of cohesion due to the water molecules, or termed as their tendency to stick up to one another is expressed by the property of cohesion of water.

Cohesion can be considered as an act, state, and the process of sticking alike molecules together consisting of alike molecules or otherwise entities. An example showing cohesion is of course water molecules. The tendency of several water molecules to compact together is referred to as cohesion property and is held together by a particular cohesive force described as an intermolecular hydrogen bond.

Water is attracted to water itself whereas, in adhesion, water is attracted to some other substances. Adhesion and cohesion are generally considered properties of water that can affect every water molecule present on the Earth and also the water molecule interaction with molecules of other substances as well.

Cohesion is also depicted as an ordinal type of measurement and is generally described as having “high cohesion” or “low cohesion” properties. Modules having high cohesion tend to be preferable, due to which high cohesion is associated with a variety of desirable traits included in software such as reliability, reusability as well as understandability.

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When the force become stronger, the acceleration becomes larger and the velocity changes by a wider margin.

We know that the force is that which makes motion to occur. In other words, an object would continue in its state of rest or uniform motion unless it is acted upon by an external force.

We know that the stronger the force the greater the acceleration since force is directly proportional to the acceleration of a body. Given this statement, it is important to also know that acceleration is the change of velocity with time.

When the force become stronger, the acceleration becomes larger and the velocity changes by a wider margin.

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The equilibrium constant is the ratio of the reactants to the products which is 2.

The equilibrium constant shows the extent to which the reactants are converted into products. The equation of this reaction could be written from the number of molecules of the reactants.

Let the reactants be A and B and the product C, the reaction equation thus becomes;

The equilibrium constant is the ratio of the reactants to the products which is 2.

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Answer:

D All living things grow and develop

Explanation:

the question is asking about photosynthesis and use of sugar for metabolic process like growth , use of energy for cell divison etc . this is basic for all living things.