How many liters of methane gas (CH4) need to be combusted to produce 12.4 liters of water vapor, if all measurements are taken at the same temperature and pressure? Show all of the work used to solve this problem.

CH4 (g) + 2 O2 (g) ---- CO2 (g) + 2 H2O (g)

Question

How many liters of methane gas (CH4) need to be combusted to produce 12.4 liters of water vapor, if all measurements are taken at the same temperature and pressure? Show all of the work used to solve this problem. 

CH4 (g) + 2 O2 (g) ----> CO2 (g) + 2 H2O (g)

abb0t · Answer

I think this is using STP so 22.4 L/mol
Use dimensional analysis to convert between moles of water and methane