Gas Stoichiometry

Question 1

Nitrogen reacts with hydrogen to produce ammonia gas as follows.How many moles of nitrogen would react with excess hydrogen to produce 520 mL of ammonia?

Question 2

Which correctly defines molar volume of an ideal gas?

Revolt · Accepted Answer

A: the volume that is occupied by 1 mol of an ideal gas at STP, which is 22.4 L

Question 3

Consider the equation.Which represents the correct mass-volume relationship at STP?

Revolt · Accepted Answer

A: 32.00 g of O2 react with an excess of H2 to produce (2 ´ 22.4) L of H2O.

Question 4

Consider the balanced chemical equation for the combustion of methane (CH4).Given that the molar mass of CO2 is 44.01 g/mol, how many liters of oxygen is required at STP to produce 88.0 g of CO2 from this reaction?

Question 5

Decomposition of potassium chlorate (KClO3) produces potassium chloride (KCl) and pure oxygen (O2). The balanced equation for the reaction is as follows.What volume of oxygen gas is released at STP if 10.0 g of potassium chlorate is decomposed? (The molar mass of KClO3 is 122.55 g/mol.)

Question 6

What is the molar volume of a gas at standard temperature and pressure?

Revolt · Accepted Answer

D: 22.4 L

Question 7

According to the equation 2Na + 2H2O 2NaOH+H2, what mass of Na is required to yield 22.4 L of H2 at STP? (The atomic mass of Na is 22.99 u.)

Question 8

Consider the reaction.Which statement is true at STP? (The atomic mass of Zn is 65.39 u.)

Question 9

What volume would 3.01•1023 molecules of oxygen gas occupy at STP?

Revolt · Accepted Answer

C: 11.2 L

Question 10

Propane (C3H8), a fuel that is used in camp stoves, produces carbon dioxide (CO2) and water vapor (H2O) on combustion as follows.Given that the molar mass of H2O is 18.02 g/mol, how many liters of propane are required at STP to produce 75 g of H2O from this reaction?

Gas Stoichiometry Answers

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