Question

- calculate relative formula mass

[N=14, O=16, Mg=24, Al=27]

1) Mg(NO3)2

- calculate relative molecular mass
[H=1, C=12, O=16]

1) C4H10

2) CH3COOH​

Answer 1

Mg(NO3)2:-

`\\ \sf \longmapsto \: 24u+2(14u+3* 16u)`

`\\ \sf \longmapsto \: 24u+2(14u+48u)`

`\\ \sf \longmapsto \: 24u+2(62u)`

`\\ \sf \longmapsto \: 24u+(124u)`

`\\ \sf \longmapsto \: 148u`