If the fuel had a mass of 2g,
how much heat energy does
each gram of fuel release?

Explanation:

Worked example – calculating energy per gram of fuel

Energy given out = mass of water × 4.2 × temperature change.

Energy measured in joules, J.

4.2 is the specific heat capacity of water, J/g°C.

Temperature change = temperature of water after heating – temperature of water before heating.

the answer is learned

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.