The balanced equation shows the products that are formed when pentane open paren cap c sub 5 cap h sub 12 close paren is combusted. cap c sub 5 cap h sub 12 plus 8 cap o sub 2 rightarrow 5 CO sub 2 plus 6 cap h sub 2 cap o What is the mole ratio of oxygen to pentane?

In a balanced equation, the coefficients give the mole ratios of the substances. Pentane has a coefficient of 1, and oxygen (O₂) has a coefficient of 8, so the mole ratio of oxygen to pentane is 8 to 1. Therefore, the correct choice is “ratio of 8 to 1.”

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