Calculate the molar mass of the following compounds:

(a) hydrogen fluoride, HF

(b) ammonia, NH3

(c) nitric acid, HNO3

(d) Silver sulfate, AG2SO4

(e) boric acid, B (OH) 3

Molar mass

The mass present in one mole of a specific species.

The molar mass of a compound, can easily be calculated as the sum of the all the individual atom multiplied by the number of total atoms.

(a)) hydrogen fluoride, HF

Since,

Molar mass of of the atoms are -

Hydrogen, H = 1 g/mol

Fluorine, F = 19 g/mol.

Molar mass of HF = (1 g/mol) + (19 g/mol) = 20 g/mol.

(b) ammonia, NH₃

Molar mass of of the atoms are -

nitrogen, N = 14 g/mol

and Hydrogen, H = 1 g/mol

Molar mass of NH₃ = 14 + (3 x 1) g/mol = 17 g/mol.

(c) nitric acid, HNO₃

Molar mass of of the atoms are -

oxygen, O = 16 g/mol.

Hydrogen, H = 1 g/mol

nitrogen, N = 14 g/mol

Molar mass of HNO₃ = (1 g/mol) + (14 g / mol) + (3 x 16) = 63 g/mol.

(d) Silver sulfate, Ag₂SO₄

Molar mass of of the atoms are -

silver, Ag = 108 g/mol

sulfur, S = 32 g/mol.

oxygen, O = 16 g/mol.

molar mass of Ag₂SO₄ = (2 x 108 g/mol) + (32 g / mol) + (4 x16 g/mol)

=312 g/mol.

(e) boric acid, B (OH) ₃

Molar mass of of the atoms are -

boron, B = 11 g/mol

oxygen, O = 16 g/mol.

Hydrogen, H = 1 g/mol

Molar mass of B (OH) ₃ = (11) + (3x16) + (3 x 1) = 62 g/mol.