How many grams of oxygen are required to react with 16.0 grams of octane (c8h18) in the combustion of octane in gasoline?

56 grams of oxygen are required to react with 16.0 grams of octane C₈H₁₈

C₈H₁₈  including alkane hydrocarbons which when burned perfectly will produce CO₂ and H₂O

Complete combustion of Hydrocarbons with Oxygen will be obtained by CO₂ and H₂O compounds.

If O₂ is insufficient there will be incomplete combustion produced by CO and H₂O

Hydrocarbon combustion reactions (specifically alkanes)

For gas combustion reaction which is a reaction of hydrocarbons with oxygen produces CO₂ and H₂O (water vapor). can use steps:

Balancing C atoms, H and last atoms O atoms

Octane combustion reaction

C₈H₁₈ + O₂ ---> CO₂ + H₂O

To equalize the reaction equation we give the reaction coefficients with variables a, b and c while the most complex compounds, namely Octane, we give the number 1

So the reaction becomes

C₈H₁₈ + aO₂ ---> bCO₂ + cH₂O

C atom on the left 8, right b, so b = 8

left H atom = 18, right 2c so 2c = 18 ---> c = 9

Atom O on the left 2a, right 2b + 2c, so 2a = 2b + 2c

2a = 2.8 + 9

2a = 16 + 9

2a = 25

a = 25/2

The equation becomes:

C₈H₁₈ + 25/2O₂ ---> 8CO₂ + 9H₂O or

2C₈H₁₈ + 25O₂ ---> 16CO₂ + 18H₂O

To find the mass O₂, we find the mole first from the mole ratio with Octane

Mr. octane = 8.Ar C + 18.Ar H

Mr. octane = 8.12 + 18.1

Mr octane = 96 + 18

Mr octane = 114

known octane mass: 16 grams then the mole:

mole = gram / Mr

mole = 16/ 114

mole = 0.14

because of the ratio of the reaction coefficient between O₂ and octane = 25: 2 then the mole of O₂ =

25/2 x 0.14 = 1.75

So that the mass O₂ =

mole. Mr = 1.75 32

mass = 56 grams

a combustion reaction

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the type of chemical reaction

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The combustion of alkanes, alkenes, and alkynes

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Complete combustion of a sample of a hydrocarbon

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Keywords: Complete combustion of Hydrocarbons, alkanes, equalize the reaction equation

i do not get it   at all

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.