How many moles of H2O are formed from the combustion of 5.0 mol CH4

Question:

How many moles of H2O are formed from the combustion of 5.0 mol CH4

For any balanced chemical reaction, whole numbers (coefficients) are used to show the quantities (generally in moles ) of both the reactants and products. For example, when oxygen and hydrogen react to produce water, one mole of oxygen reacts with two moles of hydrogen to produce two moles of water.

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;