The amount of water vapour produced by the complete combustion of 16 g of methane is:

1. 9 g
2. 18 g
3. 36 g
4. 27 g

What is the number of moles of methane required to produce 22 g of CO₂(g) after complete combustion?

1. 1 mole

2. 0.5 mole

3. 1.5 mole

4. 2 mole