CH4+2O2———> CO2 +2H2O
M(CH4)=16.0 g/mol
30g CH4*1mol/16.0 g - mol of CH4
30g CH4*(1mol/16.0 g)*(2 mol H2O/1 mol CH4) =15 mol H2O
30g CH4*(1mol/16.0 g)*(2 mol H2O/1 mol CH4)*22.4L/1mol=84 L H2O as gas, but at STP water should be liquid,so
15 mol H2O*18g H2O/1 mol=270g of H2O
270g*1ml/1g= 270 ml =0.27 L of liquid water, in reality it should be like this,
but I do not know what people who created this problem wanted H2O as liquid or as gas
