Question

Calculate the formula masses of the following compounds
(a) Sodium oxide, Na2O
(b) Aluminium oxide, Al2O3
(Given Atomic Masses Na = 23 u; O = 16 u; Al = 27 u)

Answer 1

Answer: Na²O

Na=23 u & O= 16 u

Now in Na²O there are two sodium atoms and one oxygen atom therefore its mass would be : 23×2 + 16

46+ 16= 62

Explanation:

Answer 2

Explanation:

Aluminium oxide ,AU2o3