I have this AP Chemistry problem i need help with!?

Question

Calculate the mass ratio of the following properties for 1.0 kg of air versus 1.0 kg of iron at 25 degrees Celsius:

a) Mass

b) Volume

c) Density

Can you also please explain how you got the answer? Thanks!

Answer 1

a) Mass 1kg / 1kg = 1

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c) Density from the CRC handbook

air = 0.00161 grams / ml

Iron= 7.87 g/ml

density ratio air/iron = 0.00161 air / 7.87 iron = 2.05 e-4

density ratio iron / air = 7.87 iron / 0.00161 air = 4890

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b) Volume

iron: 1000 g @1 ml/7.87 g = 127 ml

air: 1000g @  1ml / 0.00161 g = 621,000 ml

volume ratio : air/iron = 621,000 / 127 = 4890

volume ratio : iron to air = 127 / 621000 = 2.05e-4

Answer 2

that will always one.. you don't have to learn chemistry for that.. just go through class 2 math book once!