Question

write the formula of the following and calculate molecular mass
1. ammonium oxide
2.sodium sulphate
3.aluminium nitrate

Answer 1

1) Ammonium oxide -> (NH4)2O
molec.mass= 2+8+1 = 11

2) Na3SO4
=> molecular mass = 3+1+4= 8

3) Al2NO3
=> molecular mass=> 2 + 1 + 3 = 6

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