Question

Calculate formula unit mass of calcium chloride CaCl​2 {atomic mass of calcium is 40u and chlorine is 35.5u }

Answer 1

We know the mass of Ca is 40 u and the mass of Cl is 35.5 u.

Therefore,

Formula mass= 40 + 2(35.5) = 40 + 71 = 111 u*

Answer 2

CaCl2

40+ 35.5(2)

40+71
111 g