Can someone help me figure out which one is wrong or if they’re all right. I thought I was right but there’s probably not a high chance that they should all be checked off

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.

i think it is true since you can test the answer and can use observations to complete it.

particle   p is an electron and particle q is a neutron