How many moles of water are formed when 22 mol of methane combusts?

Methane is a hydrocarbon which when burns in air (combustion) produces carbon dioxide and water. The equation for the reaction;

CH4 + 2O2 = CO2 + 2H2O

When one mole of methane combusts 2 moles of water are formed

Therefore; when 22 moles of methane combusts 44 moles of water are formed (22 * 2)