2.00 g of an unknown gas at stp fills a 500 mL flask. What is the molar mass of the gas?

What is the volume of 3.5 moles of oxygen gas (O₂) at standard temperature and pressure (STP)?

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

Which gas occupies the highest volume at STP?

0.02 mol of O₂

0.1 mol of Cl₂

1 mol of N₂

2 mol of H₂

What is the volume occupied by 51.0 g of ammonia (NH₃) gas at STP?

What is the mass (in grams) of 10.00 L of propane vapor (C₃H₈) at STP?

What volume, in liters, does 128 grams of O₂ occupy at STP?

What volume, in liters, does 128 grams of O₂ occupy at STP?

What is the mass of 3.45l of gaseous ammonia (NH₃) at STP? Round to 3 significant figures.