Question

The mass of an empty 100 cm3 flask is 200g .When the flask is filled with a gas X the mass of 221 g .Calculate the density of gas X

Answer 1

V = 100cm^3 = 0.1L

M of flask = 200g = 0.2kg

M of gas = 0.221g - M of flask

0.221 - 0.2 = 0.021kg

D = M / V

D = 0.021 / 0.1

D = 0.21 kg/m^3

Thanks

Answer 2

Mass of gas = Mass of empty class - Mass of filled glass = 21 g

Volume = 100 cm³

Density = mass / volume = 21/100 g/cm³ = .21 g/cm³