Molar Volume Stoichiometry

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.

What mass of sodium chloride would be produced from the reaction of 11.2 liters of chlorine gas at STP with excess sodium?

• 29.2 g

• 58.4 g

• 9.23 g

• 18.4 g

Tags

NGSS.HS-PS1-7

A sample of 0.25 mol of oxygen gas is contained in a flask with a volume of 5.00 L. What can you conclude about an equal volume of nitrogen gas at the same temperature and pressure as the oxygen gas?

• It will have the same mass.

• It will have the same density.

• It will contain the same number of particles.

• It will have higher kinetic energy.

A sample of gas with a volume of 30.0 mL at 25.0^oC is heated to 50.0^oC.  What is the new volume of the gas?

• 60.0 mL

• 15.0 mL

• 27.5 mL

• 32.5 mL

What is the first thing you must do to solve a stoichiometry problem?

• Write a Balanced Equation

• Panic

• Write an Unbalanced Equation

• Ask for help

2H₂   +   O₂  →  2H₂O
How many moles of water can be produced if 8 moles H₂ are used?

• 4 moles

• 8 moles

• 16 moles

• 2 moles

Tags

NGSS.HS-PS1-7

1 mole of any gas at STP has a volume of ______________________. 

• 22.4 liters

• 44.2 liters

• 6.02 x 10²³ liters

• 2.4 liters

What is the molar volume of a gas at STP?

• 22.4 L

• 44.8 L

• 11.2 L

• 33.6 L

If 44.8 liters of hydrogen gas at STP are reacted with excess oxygen, how many moles of water are produced?

• 1 mole

• 2 moles

• 3 moles

• 4 moles

Tags

NGSS.HS-PS1-7

A sample of nitrogen gas occupies 22.4 L at STP. How many moles of nitrogen gas are present?

• 0.5 moles

• 1 mole

• 2 moles

• 4 moles