# Gas Laws Practice Problems

**1. Calculate the density of chlorine gas at STP.**

**2. What is the molar volume of a gas at 78°C and 1.20 atm?**

**3. A gas occupies 6.66 liters at STP. What is its volume at 546°C and 684 torr?**

**4. How many grams of carbon dioxide are in a 5.60 liter container at 0°C and 2.00 atmospheres pressure?**

**5. A sample of N _{2} is collected by bubbling over water at 21 °C. If the total pressure of the gas is 1.02 atmospheres. What is the partial pressure of dry N_{2}?**

**6. A mixture of gases contains nitrogen at a partial pressure of 0.50 atmospheres and oxygen at a partial pressure of 0.30 atmospheres. If mixture contains 28.0 grams of nitrogen gas, what is the total number of moles in the mixture.**

**7. Use the following balanced chemical equation to answer the questions below:**

4 Na(*s*) + O_{2}(*g*) → 2 Na_{2}O(*s*)

- How many grams of sodium are needed to completely react with 2.80 liters of O
_{2}at STP? - What volume of O
_{2}at 25°C and 2.00 atm is needed to completely react with 4.60 grams of sodium?

**8. What is the density of ethane gas at 78°C and 1.20 atm?**

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Temp (°C) | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 |

\(\mathrm{P_{H_2O}}\) (mm Hg) | 13 | 14 | 15 | 15 | 16 | 18 | 19 | 20 | 21 | 22 | 24 |