A major component of gasoline is octane c8h18. when octane is burned in air, it chemically reacts with oxygen gas o2 to produce carbon dioxide co2 and water h2o. what mass of oxygen gas is consumed by the reaction of 6.0g of octane?

Question

Maritza Hodge

Chemistry

29 February, 21:11

A major component of gasoline is octane c8h18. when octane is burned in air, it chemically reacts with oxygen gas o2 to produce carbon dioxide co2 and water h2o. what mass of oxygen gas is consumed by the reaction of 6.0g of octane?

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Elsa Vincent · Answer 1

The reaction involved in the problem is called a combustion reaction. The balanced chemical reaction is expressed as:

C8H18 + 25/2O2 = 8CO2 + 9H2O

TO determine the amount of oxygen gas needed to completely react the given amount of C8H18, we use the amount of the other reactant and the relation of the substances from the chemical equation. We do as follows:

6.0 g C8H18 (1 mol C8H18 / 114.26 g C8H18) (25/2 mol O2 / 1 mol C8H18) (32 g O2 / 1 mol O2) = 21.00 g O2

Therefore, to completely react 6 g of octane we need at least 21 g of oxygen gas.