1. Calculate the molar mass of a gas if 0.440 g occupies 179 mL at 0.10 atm and 86°C
2. In the synthesis of ammonia gas from nitrogen and hydrogen, N2 (g) + 3 H2 (g) → 2 NH3 (g) what is the maximum volume, in L, of NH3 that can be formed from 2.5 L of H2?
3. What is the mole fraction of oxygen in the mixture containing 0.25 mol each of oxygen, hydrogen, and carbon dioxide at 298 K?