Question

find. the. molecular mass of the following compound (a) copper nitrate (b) aluminium chloride (c) zinc oxide (d) ferric. acid (e) lithium hydride (f) hydrogen sulphide (g) nitric acid (h) sodium bicarbonate

Answer 1

 Molecular Mass of the above compounds are given below ⇒

(a). Molecular Mass of the CuNO₃ = 63.5 + 14 + 48
   =  125.5 g

(b). Molecular Mass of the AlCl₃ = 27 + 35.5 × 3 
 = 27 + 106.5
= 133.5 g.

(c). Molecular Mass of the Zinc Oxide(ZnO) = 65 + 16
 = 81 g.

(d). Molecular Mass of the Ferric Acid (FeCl₃)  = 56 + 35.5 × 3
 = 56 + 106.6
 = 162.5 g.

(e). Molecular Mass of the Lithium Hydride (LiH) = 7 + 1
 = 8 g.

(f). Molecular Mass of the Hydrogen Sulphide(H₂S) = 2 × 1 + 32
 = 34 g.

(g). Molecular Mass of the Nitric Acid (HNO₃) = 1 + 14 + 16 × 3
= 15 + 48
= 63 g.

(h). Molecular Mass of the Sodium Bicarbonate (NaHCO₃) = 23 + 1 + 12 + 16 × 3
= 36 + 48
= 84 g.


Hope it helps.