7. Gases

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)?

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

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

C₆H₁₂O₆ (s) + 6 O₂ (g) → 6 CO₂ (g) + 6 H₂O (l)

Calculate the mass of H₂O produced when 12.0 g of glucose is combusted in a container of oxygen with a volume of 1.3 L at a pressure of 2.2 atm and a temperature of 205℃.