Question

calculate the molar mass of HCI and CO2​

Answer 1

molar mass of HCl =36.5g

molar mass of CO2 =44g

Answer 2

Answer:

The molecular mass of a compound is defined as the mass of one molecule. Molecular mass differs because of the isotopes. The unit in which molecular mass is measured is amu. Amu stands for atomic mass units.

We need to find the molecular mass of the given compounds

(i) NH3

Molecular mass of NH3 = Atomic mass of N + 3 × Atomic mass of H

Molecular mass of Nitrogen = 14

Molecular mass of hydrogen = 1

Molecular mass of NH3 = 14 + 3 x 1

Molecular mass of NH3 = 17 g

(ii) CO2

Molecular mass of CO2 = Molecular mass of carbon + 2 (Molecular mass of oxygen) {2 atoms of oxygen are present)

Molecular mass of carbon = 12

Molecular mass of oxygen= 16

Molecular mass of CO2 = 12 + (16 × 2)

Molecular mass of CO2 = 12 + 32

Molecular mass of CO2 = 44 g

(iii) HCl

Molar mass of hydrochloric acid

Molecular mass of Hydrogen = 1

Molecular mass of chlorine= 35.5

Molar mass of = 1 + 35.5 = 36.5 g

(iv) Cl2

Molar mass of Cl2 = 35.5

Molecular mass of Cl2= 2 x Atomic mass of Cl

Molecular mass of Cl2 = 2 x 35.5

Molecular mass of Cl2 = 71g

Explanation: