E85 fuel is a mixture of 85% ethanol and 15% gasoline by volume. What mass in kilograms of E85 (d = 0.758 g/mL) can be contained in a 14.0-gal tank?

A gallon is a unit of volume in both the US customary and imperial systems of measurement. The US gallon is defined as 231 cubic inches (3.785 liters).

1 gal = 3785.41 mL.

V = 14 gal · 3785.41 mL:

V = 52995.74 mL.

m = 52995.74 mL · 0.758 g/mL.

m = 40170.77 g; mass of fuel.

m = 40170.77 g ÷ 1000 g/kg.

m = 40.17 kg.

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BarrettArcher BarrettArcher · Answer 2 · 2019-01-14T10:03:57+01:00

Answer : The mass of E85 fuel is, 40.166 kilogram.

Solution : Given,

Volume of E85 fuel = [tex]14gallon=14\times 3785.41ml/gal=52990ml[/tex]

[tex](1gallon=3785.41ml)[/tex]

Density of E85 fuel = 0.758 g/ml

Formula used :

[tex]\text{Mass of E85 fuel}=\text{Density of E85 fuel}\times \text{Volume of E85 fuel}[/tex]

Now put all the given values in this formula, we get

[tex]\text{Mass of E85 fuel}=0.758g/ml\times 52990ml=40166.42g=40.166Kg[/tex]

[tex](1Kg=1000g)[/tex]

Therefore, the mass of E85 fuel is, 40.166 kilogram.