Calculate the ratio of the following properties for 1.0kg of air vs 1.0kg of iron @ 25 degree celsius?

Question

(a)mass (b)volume (c)density [plz plz help me :)]

Answer 1

a) mass is 1.0kg in both cases, so 1 : 1

b) volume: volume is inverse of density for equal mass, so given the density in part c), volume ratio is 1: 6558, iron to air.

c) density: iron 7.87 g/cm^3; air 1.20 kg/m^3 = 0.0012 g/cm^3

so approximately 6558 : 1, iron to air