Chemistry

Problem

A steel gas cylinder of volume

5\,\text{L}

has a mass of

2.50\,\text{kg}

when empty. When filled with an unknown gas at room conditions, its mass becomes

2.57\,\text{kg}

. a. (i) Calculate the mass of the gas contained in the cylinder. b. (ii) Convert the volume of the cylinder to

\text{m}^{3}

. c. (iii) Determine the density of the unknown gas in

\text{kg\,m}^{-3}

. d. (iv) The density of air at the same conditions is approximately

1.29\,\text{kg\,m}^{-3}

. Is the unknown gas lighter or heavier than air? State your reason based on the value obtained in part (iii).