Calculate the amount of water(g) produced by the combustion of 16 gram of Methane.

Combustion reaction for methane is given as :-
CH4 + 2 O2 = CO2 + 2 H2O

So from the law of mass action it is evident that :-
16g of methane reacts with 64g of oxygen to give 36g of water
Hence, 16g of methane produces 36g of water.