# Gas calculations

## Stage 1

How many moles of gas (at room temperature and pressure) are present in:

1. 99 dm3 of chlorine, Cl2(g)?

2. 123 dm3 of nitrous oxide, N2O(g)?

3. 6 dm3 of fluorine, F2(g)?

4. 24 dm3 of ethene, C2H4(g)?

5. 12 dm3 of ethane, C2H6(g)?

## Stage 2

What volume of gas in dm3 (at room temperature and pressure) would be occupied by:

6. 0.125 moles of neon, Ne(g)?

7. 1 moles of nitrous oxide, N2O(g)?

8. 3.875 moles of propene, C3H6(g)?

9. 7.375 moles of helium, He(g)?

10. 0.625 moles of oxygen, O2(g)?

## Stage 3

11. How many moles of gas (at room temperature and pressure) are present in 18000 cm3 of argon, Ar(g)?

12. What volume of gas in dm3 (at room temperature and pressure) would be occupied by 9.625 moles of neon, Ne(g)?

13. How many moles of gas (at room temperature and pressure) are present in 15000 cm3 of carbon dioxide, CO2(g)?

14. How many moles of gas (at room temperature and pressure) are present in 9000 cm3 of hydrogen chloride, HCl(g)?

15. What volume of gas in cm3 (at room temperature and pressure) would be occupied by 0.875 moles of helium, He(g)?

1. 4.125 moles

2. 5.125 moles

3. 0.25 moles

4. 1 moles

5. 0.5 moles

6. 3 dm3

7. 24 dm3

8. 93 dm3

9. 177 dm3

10. 15 dm3

11. 0.75 moles

12. 231 dm3

13. 0.625 moles

14. 0.375 moles

15. 21000 cm3