Question

C. Numericals :.
1. The density of air is 1.28 g litre-1. Express it in:
(a) g cm 3 (b) kg m-3.​

Answer 1

The density of air is

a) 0.00128 gram / cubic centimetre

b) 1.28 kilograms / cubic metre

The density of air which is denoted as ρ, is nothing but the mass per unit volume of Earth's atmosphere. Like air pressure, density of air also decreases with increase in altitude. It also changes with variation in temperature and humidity.