Question

Question: I was running behind this morning and had to pick up gas because my tank was on empty. I added 20.1 gallons of gas to top off my car.

If my car has a dry weight (without gas) of 2867 pounds. What percentage of my car's mass is gasoline after filling it up?
1 gallon = 3.785 L
Density of gasoline = 0.737 kg/L
1 kg = 2.20 pounds
DO NOT INCLUDE THE % SIGN

Answer 1

Answer: 4.11 percent of the car's mass is gasoline after filling it up.

Step-by-step explanation:

20.1gallons multiplied by 3.785L/gal multiplied by 0.737kg/L multiplied by 2.20lbs per kg. Then divide by total mass of the car. Add the dry weight plus the weight of the gasoline found to find the total weight. Multiply by 100 to get percent.