20.4 gallons of Isooctane fuel is 117.7786 lb.
1 gallon = 3785 cm3 = 4 quart; 1 pound = 453.6 g.
20.4 gallons = 20.4 x 3785 cm³ = 77214 cm³ = 77214 ml
Density = mass/volume ⇒ mass = density x volume
Given density is 0.6919 g/cm3
Mass = 0.6919 x 77214 = 53424.3666 g
1 g = 1/453.6 lb ⇒ 53424.3666 g =53424.3666 /453.6 lb = 117.7786 lb.
isooctane or iso-octane is also known as 2,2,4-Trimethylpentane,
being an important component of gasoline, it is frequently used in relatively large proportions (around 10%) to increase the knock resistance of fuel.
An antiknock agent is a gasoline additive which is used to reduce engine knocking and also increases fuel's octane rating by raising the temperature and pressure at which auto-ignition occurs.
learn more about isooctane fuel here-
https://brainly.com/question/13794417
#SPJ9
