Question

Calculate the formula unit masses of ZnO, Na2O, K2CO3, given atomic masses of Zn = 65u, Na
= 23u, K = 39 u, C =3 12 u, and O = 16 u

Answer 1

Answer:

Hi mate, here is your answer

Unified mass of:-

1. ZnO = 81u
2. Na²O = 62u
3. K²CO³ = 122u

Explanation:

→ ZnO = ( 65 + 16 ) u

→ Na²O = [ ( 23 × 2 ) + 16 ] u

→ K²CO³ = [ ( 23 × 2) + 12 + ( 16 × 3 ) ]

Hope this may Help you

Answer 2

The formula unit mass of

(i) ZnO = 65 u + 16 u = 81 u

(ii) Na2O = (23 u x 2) + 16 u = 46 u + 16 u = 62 u

(iii) K2C03 = (39 u x 2) + 12 u + 16 u x 3

= 78 u + 12 u + 48 u = 138 u