Question

Question #0f9d6

Answer 1

1 : 2 : 1 : 2

Explanation:

Always balance the most complicated molecules first (we'll leave `O_2` last here). We see that we have 1 carbon on both sides, so that's fine, but we have 4 H in the reactants and only 2 H in the products. Make the coefficient of `H_2O` 2 and then the hydrogens will be balanced. Now all that's left to do is balance O_2, which is simple. We see that we now have 4O on the products side, since we added the 2 in front of `H_2O` and there is another 2O in `CO_2`. All we have to do is add a 2 in front of the `O_2`.