What is true about the energy involved in a chemical reaction? (3 points) the amount of energy is constant, but it is converted from one form to another. the amount of energy decreases as it is converted from one form to another. the amount of energy increases as it is converted from one form to another. the amount of energy may increase or decrease depending on the type of reaction.

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.