What is the mole ratio of C5 H12 to H2 in the following reaction? C5 H12→ C5 H8 + 2H2

really? read the equation.

1:2

The balanced chemical equation for the reaction is:

C5H12 → C5H8 + 2H2

From the equation, we can see that the mole ratio between C5H12 and H2 is 1:2. This means that for every 1 mole of C5H12, 2 moles of H2 are produced.