If you drive a car to work, what fraction of the chemical energy of the gasoline ultimately ends up as heat?

All of the chemical energy of the gasoline ends up as heat

Explanation:

Gasoline has chemical energy stored in it. When used as a fuel to power a car, the gasoline is combusted to convert the chemical energy stored within into heat energy, and power the car. The heat energy is further converted to mechanical energy, light energy, sound energy, etc.

these nuts

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.