# How many moles of CO_2 are formed from .5 mole of C_8H_18 with ample O_2?

${C}_{8} {H}_{18} \left(g\right) + \frac{17}{2} {O}_{2} \left(g\right) \rightarrow 8 C {O}_{2} \left(g\right) + 9 {H}_{2} O \left(g\right)$
So how many moles of product if only $\frac{1}{2}$ a mole of octane were used?