Question

Calculate the relative molecular masses of ..
a.potassium calorate -KClO3
b.Chlorofrom -CHCl3
c.Sodium acetate-CH3COONa
d.Ammonium sulphate- (NH4)2SO4

[use atomic weights,K=39, Cl=35.5,O=16 ,C= 12 , H=1 , Na=23 , N=14 , S=32]

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Answer 1

Explanation:

(a ) KClO3= 39 + 35.5 + 16 × 3 = 122.5 u, ( b) CHCl3= 12+ 1 + 35.5×3 = 119.5 u, ( c) CH3COONa= 12+ 1×3+ 12+ 16 +16+ 23 = 82 u. (d) ( NH4)2 SO4 = 14×2 + 1×8 + 32 + 16×4 = 132 u.