Chemistry, 21.08.2019 00:00 monicorequena7

How many grams of oxygen are required to react with 10.0 grams of octane (c8h18) in the combustion of octane in gasoline?

Answers: 1

Show answers

Answers

Oh fun, stoichiometry. So the equation for this is C8H18+O2> CO2+H2O, or
2C8H18+25O2> 16CO2+18H2O when balanced. 10/114.229 g/mol = .087543... mol, converting to moles by dividing by molar mass. The ratio is 25/2, using the integers in front of the molecules in the balanced equation. so you just multiply .087543... by the ratio. That's 1.09429, which you multiply by the molar mass of O2, 31.9988 g/mol. The answer is 35.02 g O2

Answer from: lanc3r3vo

35.2 grams of oxygen are required to react with 10.0 grams of octane

$\boxed{\boxed{\bold{Further~explanation}}}$

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 H and O

Hydrocarbon combustion reactions (specifically alkanes)

$\large{\boxed {\bold {C_nH _ (_2_n _ + _ 2_) + \frac {3n + 1} {2} O_2 ---- nCO_2 + (n + 1) H_2O}}}$

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 be

2C₈H₁₈ + 25O₂ ---> 16CO₂ + 18H₂O

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

1. We are looking for the octane mole

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

Mr. octane = 8.12 + 18.1

Mr octane = 96 + 18

Mr octane = 114

known octane mass: 10 grams then the mole:

mol = gram / Mr

mol = 10/ 114

mol = 0.088

2. We look for the O₂ mole

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

25/2 x 0.088 = 1,1

So that the mass O₂ =

mole. Mr = 1.1 32

mass = 35.2 grams

$\boxed{\boxed{\bold{Learn~more}}}$

a combustion reaction

link

the type of chemical reaction

link

The combustion of alkanes, alkenes, and alkynes

link

Complete combustion of a sample of a hydrocarbon

link

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

How many grams of oxygen are required to react with 10.0 grams of octane (c8h18) in the combustion o

Answer from: Quest

fun caring loving person

Answer from: Quest

m=9

step-by-step explanation:

7m+8=71 subtract 8 from 71 which is 63 than divide it by 7m equal 9.

Other questions on the subject: Chemistry

Chemistry, 21.06.2019 16:30, annan65

Jewelweed, a flowering plant, has seed pods that burst open when touched and forcefully eject their seeds. these structures are favorable because they a. can cause genetic changes to occur. b. prevent germination within the seed pod. c. aid in the dispersal of the species. d. attract insects that aid in pollination.

Answers: 3

continue

Chemistry, 22.06.2019 11:00, pindu

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it

Answers: 1

continue

Chemistry, 22.06.2019 14:00, BrandyLeach01

How does the presence of oxygen affect the chemical pathways used to extract energy from glucose?

Answers: 3

continue

Chemistry, 22.06.2019 14:50, rebeccamckellpidge

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Answers: 3

continue

You know the right answer?

How many grams of oxygen are required to react with 10.0 grams of octane (c8h18) in the combustion o...