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Rashid [163]
3 years ago
10

PLEASE HELP!CHEMISTRY QUESTION

Chemistry
1 answer:
ozzi3 years ago
8 0

<u>Answer:</u> The partial pressure of nitrogen on Venus is 81 mmHg

<u>Explanation:</u>

To calculate the partial pressure of the gas, we use the equation given by Raoult's law, which is:

p_{A}=p_T\times \chi_{A}

where,  

p_A = partial pressure of nitrogen gas = ?

p_T = total pressure = 2700 mmHg

\chi_A = mole fraction of nitrogen gas = 3.0 % = 0.03

Putting values in above equation, we get:

p_{N_2}=2700mmHg\times 0.03\\\\p_{N_2}=81mmHg

Hence, the partial pressure of nitrogen on Venus is 81 mmHg

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The given equilibrium reaction is,

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The given reaction is exothermic. So, heat energy will be a product. Therefore, decreasing the temperature (heat energy) would lead to the formation of more products as when the amount of energy which is a product is reduced, there is more room for the products to form.

Increasing the pressure would shift the equilibrium towards that side which has least number of moles of the gaseous substance. Hence, here increasing the pressure would lead to the formation of more products by shifting the equilibrium towards the right side.

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Answer:

\boxed {\boxed {\sf 0.0018 \ mol \ H_2 O }}

Explanation:

First, we need to find the molecular mass of water (H₂O).

H₂O has:

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Use the Periodic Table to find the mass of hydrogen and oxygen. Then, multiply by the number of atoms of the element.

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Now, find the mass of H₂O. Add the mass of 2 hydrogen atoms and 1 oxygen atom.

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The original measurement given had two significant figures (3,2). We must round to have 2 significant figures. All the zeroes before the 1 are not significant. So, round to the ten thousandth.

The 7 in the hundred thousandth place tells us to round up.

0.0018 \ mol \ H_2 O

There are about <u>0.0018 moles in 0.032 grams.</u>

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