Calculate the molar mass of the following substances.

(a) Ethyne, C2H2

(b) Sulphur molecule, S8

(c) Phosphorus molecule, P4 (Atomic mass of phosphorus =31)

(d) Hydrochloric acid, HCl

(e) Nitric acid, HNO3

Asked by Vishal kumar | 1 year ago |  291

1 Answer

Solution :-

Listed below is the molar mass of the following substances:

(a) Molar mass of Ethane C2H2= 2 x Mass of C+2 x Mass of H = (2x12)+(2x1)=24+2=26g

(b) Molar mass of Sulphur molecule S8 = 8 x Mass of S = 8 x 32 = 256g

(c) Molar mass of Phosphorus molecule, P4 = 4 x Mass of P = 4 x 31 = 124g

(d) Molar mass of Hydrochloric acid, HCl = Mass of H+ Mass of Cl = 1+35.5 = 36.5g

(e) Molar mass of Nitric acid, HNO3 =Mass of H+ Mass of Nitrogen + 3 x Mass of O = 1 + 14+ 3x16 = 63g

Answered by Shivani Kumari | 1 year ago

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