Stoichiometry of Gases Worksheet

Stoichiometry of Gases

Read each question carefully and provide your answer in the space provided. Show all your work for calculations.

1. At Standard Temperature and Pressure (STP), one mole of any ideal gas occupies a volume of   L.

2. The Ideal Gas Law is represented by the equation PV = nRT, where 'R' is the  .

3. According to Avogadro's Law, equal volumes of all gases at the same temperature and pressure contain an equal number of  .

4. Which of the following conditions represents STP?

5. What is the pressure of a gas if it occupies 10.0 L at 273 K and contains 0.50 moles?

6. Calculate the volume occupied by 3.50 moles of nitrogen gas at STP.

7. A sample of oxygen gas has a volume of 5.0 L at 25°C and 1.0 atm. What will be its new volume if the temperature is increased to 50°C at constant pressure?

8. The volume of a gas is directly proportional to its absolute temperature at constant pressure.

9. In a balanced chemical equation involving gases, the coefficients represent both mole ratios and volume ratios (at constant temperature and pressure).

10. Consider the reaction: 2 H₂(g) + O₂(g) → 2 H₂O(g). If 15.0 L of hydrogen gas reacts completely with excess oxygen at STP, what volume of water vapor will be produced?

11. A 2.0 L container holds 4.0 grams of an unknown gas at 300 K and 1.5 atm. Calculate the molar mass of the unknown gas.