Question

Calculate the formula unit masses of following
a) ZnO
b) Na2O
c) CaCl2
( Atomic masses of Zn=65u, Na=23u, O=16u, Ca=40u, Cl=35.5u ).

Answer 1

Answer:

Formula unit mass of ZnO

=(Atomic mass of Zn)+(Atomic mass of O) =(65+16)u =81u

Formula unit mass of Na2O = (2×23)+16

= 62u

Formula unit mass of CaCl2 = 40+(2×35.5)

= 111u