What is the coefficient for ${{\text{O}}_{\text{2}}}{\text{(g)}}$ when the equation for the combustion of 1 mole of pentane is balanced?

${{\text{C}}_5}{{\text{H}}_{12}}{\text{(g)}} +$ _ ${{\text{O}}_2}{\text{(g)}}$ _ ${\text{C}}{{\text{O}}_2}{\text{(g)}}$ _ ${{\text{H}}_2}{\text{O(g)}}$

A.     5

B.     6

C.     8

D.     16

C