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3 years ago

Which of the following qualities do China and India have in common?

1 answer:

7 0

The answer would be: d. Populations are over one billion.

China and India are the only two countries in the world with a population of over one billion.

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An unknown gas effuses 0.5 times faster than hydrogen gas (H2). What is the molecular mass of the gas?

stepladder [879]

Rate of Effusion of Unknown gas = rX = 0.5

Rate of Effusion of Hydrogen = rH = 1

M.mass of Hydrogen = mH = 2 g/mol

M.mass of Unknown gas = mX = ?

Formula used:

rH / rX = √mX / mH

taking square on both sides,

r²H / r²X = mX / mH
Solving for mX,
mX = (r²H ÷ r²X) × mH
Putting values,
mX = [1² ÷ (0.5)²] × 2 g/mol

mX = (1 ÷ 0.25) × 2 g/mol

mX = 4 × 2 g/mol

mX = 8 g/mol

Result:
Molecular Mass of Unknown gas is 8 g/mol.

4 0

2 years ago

Sorbitol, an artificial sweetener, has a formula of c9h14o6. what is the mass of one molecule of sorbitol?

elixir [45]

The mass of one molecule of sorbitol, C₉H₁₄O₆ is 3.62×10⁻²² g

<h3>Avogadro's hypothesis </h3>

6.02×10²³ molecule = 1 mole of sorbitol, C₉H₁₄O₆

But

1 mole of sorbitol, C₉H₁₄O₆ = (12×9) + (1×14) + (6×16) = 218 g

Thus,

6.02×10²³ molecule = 218 g of C₉H₁₄O₆

With the above idea in mind, we can obtain the mass of one molecule. Details below.

<h3>How to determine the mass of 1 molecule</h3>

The mass of one molecule of C₉H₁₄O₆ can be obtained as illustrated below:

6.02×10²³ molecule = 218 g of C₉H₁₄O₆

Therefore,

1 molecule = 218 / 6.02×10²³

1 molecule = 3.62×10⁻²² g

Thus, the mass of one molecule of C₉H₁₄O₆ is 3.62×10⁻²² g

Learn more about Avogadro's number:

brainly.com/question/26141731

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7 0

1 year ago

Which of the following best describes the concept of chemical kinetics. - Investigating how experimental conditions can effect t

Nady [450]

Answer:

Investigating how experimental conditions can effect the speed of a chemical reaction and give insight into reaction mechanisim and states.

Explanation:

Chemical kinetics is a process of investigation how experimental conditions can affect the speed of a chemical reaction and give insight into reaction mechanism and states.

Chemical kinetics deals with two aspects chemical reaction; the speed at which reaction occurs(reaction rate) and the details of the steps involved in the reaction(reaction mechanism).
The two aspects are closely related.

7 0

3 years ago

H2O → H2 + O2

Eddi Din [679]

Answer:

1. two

2. two

3.one

Explanation:

The balanced equation is 2H20 > 2H2 + 02

2 moles of water requires 2 moles of hydrogen gas and 1 mole of oxygen gas.

6 0

2 years ago

The following reactions take place in the ozone layer by the absorption of ultraviolet light.

____ [38]

Answer:

Option B will require a shorter wave length of light.

Explanation:

The bonding between Ozone (O3) and Oxygen (O2) can be used to explain why the breaking of oxygen into Oxygen radicals will require a shorter wave length.

The bond between Oxygen (O2) is a double bond while Ozone (O3) has an intermediate bond between a double bond and a single bond.

The bond order of Oxygen (O2) is equals 2 while that of Ozone (O3) is 1.5. Since the bond order of oxygen is higher, it will require more energy to break the bond compared to breaking the Ozone (O3) bond.

Recall that Energy is inversely proportional to wave length.

So it will require a shorter wave length to break the Oxygen (O2) into its radicals.

5 0

3 years ago