Calculate the molecular mass of (i) oxalic and (ii) Formic acid (iii) `H_(2)SO_(4)` (iv) FAS, (v) `Na_(2)CO_(3)` (vi) sucrose

Explanation

(i) oxalic acid `(COOH)_(2).2H_(2)O = 2 xx 12 + 4 xx 16 xx 2 xx 1.008 + 4 xx 1.008 + 2 xx 16`
`=24 + 64 + 2.016 + 4.032 + 32`
`=126. 048`
(ii) Formic acid (41004) = `2 xx 1.008 + 1 xx 12 + 2 xx 16`
`= 2.016 + 12 + 32`
= 46.016
(iii) `underset("sulphuric acid")(H_(2)SO_(4)) = 2+32 + 64 = 98`
(iv) `underset("ferrous ammonium sulphate")(FAS) = [FeSO_(4) (NH_(4))_(2)SO_(4).6H_(2)O]`
=56 + 32 + 16 x 4 +(14 +4) x 2 + 32 + 16 x 4 + 18 x 6
= 392
(v) `underset("sodium carbonate")(Na_(2)CO_(3)) =23 xx 2 + 12 + 16 xx 3=106`
(vi) `underset((C_(12)H_(22)O_(11)))("Sucrose") = 12 + 2 xx 1.008 + 11 xx 16 = 392`