Question

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?

Answer 1

The answer is: mass is 40.17 kilograms.

d = 0.758 g/mL; density of fuel.

V = 14.0 gal; volume.

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.

Answer 2

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

Solution : Given,

Volume of E85 fuel = $14gallon=14\times 3785.41ml/gal=52990ml$

$(1gallon=3785.41ml)$

Density of E85 fuel = 0.758 g/ml

Formula used :

$\text{Mass of E85 fuel}=\text{Density of E85 fuel}\times \text{Volume of E85 fuel}$

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

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

$(1Kg=1000g)$

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