Kcl what combination of atoms are involved in this compound? a. 1 potassium atom and 2 chlorine atoms b. 2 potassium atoms and 1 chlorine atom c. 1 potassium atom and 1 chlorine atom d. 2 potassium atoms and 2 chlorine atoms

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.