12.3 PAP Ideal Gas Law

Find the volume that would be occupied by 0.141 moles of oxygen at STP.

• 0.317 L

• 3.16 L

• 0.00213 L

• 159 L

What is the volume of 9.22 grams of nitrogen at STP?

• 1095 L

• 14.7 L

• 68.1 L

• 7.37 L

How many moles of methane, CH4, the main constituent of natural gas, are contained in 846 milliliters of methane measured at STP?

• 0.0378 mol

• 0.000254 mol

• 3930 mol

• 26.5 mol

What is the mass of helium in a balloon if its volume is 4.39 L at STP?

• 20.4 g

• 5.10 g

• 0.784 g

• 0.00528 g

How many moles of helium will a 75.0-L balloon hold if a 27.5-L balloon holds 1.76 moles at the same temperature and pressure?

• 4.80 mol

• 0.645 mol

• 6.50 mol

• 8.50 mol