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## Homework Statement

Suppose one gallon of gasoline produces 1.1 x 10^8 J of energy, and this energy is sufficient to operate a car for twenty miles. If a 362 mg drop of gasoline could be converted completely into thermal energy, how many miles could the car go with that energy?

## Homework Equations

I cannot find a conversion for 1 gallon of gasoline to kilograms. Is it even necessary?? Also, for the 362 mg drop. I know they need to be in kilograms in order for the energy to be in JOULES.

## The Attempt at a Solution

I used the equation E0=mc^2. I plugged in 1.1 x 10^8 J for the energy and I didn't know what to use for the mass but I know that once I do that I can use the value for C using the same equation, except the second time the mass would be for the 362 mg drop.

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