Gas Laws and Stoichiometry

A mixture contains hydrogen gas with a partial pressure of 0.400 atm, oxygen gas with a partial pressure of 0.200 atm, and nitrogen gas with a partial pressure of 0.600 atm. What is the total pressure of the mixture of gases?

• 0.048 atm

• 1.200 atm

• 0.600 atm

• 0.400 atm

A mixture contains hydrogen gas with a partial pressure of 0.400 atm, oxygen gas with a partial pressure of 0.200 atm, and nitrogen gas with a partial pressure of 0.600 atm. What percentage of the gas is oxygen?

• 33.3%

• 20.0%

• 16.6%

• 25.0%

Hydrochloric acid and magnesium react to produce magnesium chloride and hydrogen gas. As in the molar volume lab, the gas is collected in a tube by water displacement. The space above the water contains

• hydrogen gas only.

• hydrogen gas, water vapor, and magnesium chloride.

• hydrogen gas and water vapor.

• hydrogen gas and magnesium chloride.

The vapor pressure of water increases as

• surface area of the water source increases.

• the surface area of the water decreases.

• temperature increases.

• temperature decreases.

The molar volume of a gas at standard temperature and pressure (STP) is

• dependent on the type of gas.

• proportional to the molar mass of the gas.

• equal to the molar mass in grams.

• 22.4 liters.

Hydrogen and oxygen react under a specific set of conditions to produce water according to the follwoing: 2H₂(g) + O₂(g) --> 2H₂O(g). How many moles of hydrogen would be required to produce 5.0 mol of water?

• 5.0 mol H₂

• 4.0 mol H₂

• 7.0 mol H

• 5.0 mol of H

Given the combustion reaction C₃H₈ + 5O₂ ​​→ 3CO₂ + 4H₂O, how many liters of carbon dioxide can be produced from 1.00 liter of O₂ at standard temperature and pressure?

• 0.600 L

• 0.825 L

• 1.21 L

• 1.67 L

Mg₃N₂ + 3H₂O ––> 3 MgO + 2NH₃

If 10.3 g of magnesium nitride is used, what volume of ammonia gas would be collected at 20˚C and 0.989 atm?

• 4.9 L NH₃

• 4.96 L NH₃

• 0.261 L NH₃

• 0.26 L NH₃

2CO + O₂ −-> 2CO₂

How many liters of carbon dioxide at STP are produced from 10.0 L of carbon monoxide at STP?

• 10.0 L

• 20.0 L

• 5010 L

• 0.0199

Tags

NGSS.HS-PS1-7

A sample of oxygen gas occupies 5.0 L at STP. What is the mass of the oxygen gas in this sample?

• 7.1 g

• 5.0 g

• 32 g

• There is not enough information to determine the mass of the oxygen gas.