Explanation:
1.CH3NH2
= 12+ (1×3)+14+(1×2)
=31.
2.C3H8
=(3×12)+ 1×8
=44
3.CHCl3
=12+1+(35.5×3)
=119.5
4.CuSO4
= 63. 546 +32.065+(16×4)
=159.611
5.NaCl
=23+35.5
=58.5
6.H2SO4
=(1×2)+32+(16×4)
= 98
7.KMnO4
= 39+55+(16×4)
=158
8.KCl
=39+35.5
=74.5
