Stoichiometry.......

Question

1 C₅H₁₂(g) + 8 O₂(g) → 5 CO₂(g) + __ H₂O(g) when balancing the above equation, how many moles of water are produced when 1 mole of C₅H₁₂ reacts with excess Oxygen Gas? 

Answer 1

The easiest way to think through this balancing of this equation is that there are initially 12 atoms of hydrogen on the reactant side of the equation. Thus, we need to get 12 atoms of hydrogen on the product side as well.

You should be able to determine what coefficient needs to be placed in front of H₂O to give us a total of 12 hydrogen atoms. (remember to multiply the coefficient by the subscript)