Question

The density of dry air is 1.12 X 10-3 g/cm3.
(a) What volume of air in cubic meters will have a mass of 1.00kg?
(b) Express this density as lb/ft3.

Answer 1

there are (10^2 )^3 = 10^6 cm^3 / m^3
there are 10^3 g / kg
so
m = 1 kg = V m^3 * 1.12 X 10-3 g/cm3 * 10^-3 kg/g * 10^6 cm^3/m^3
1 = V * 1.12
V = 0.89 m^3
or
1.12 * 10^3 g / m^3 = 1.12 kg/m^3

Answer 2

Now you do the pounds and feet

Answer 3

Do b for me.