The molar mass of helium is .

CHEMISTRY · Multi-part · A Level · Chemistry · Amount of substance · Amount of substance

Problem

The molar mass of helium is

4.00 \text{ g mol}^{-1}

. (1) Calculate the volume of

1.0 \text{ mol}

of helium at standard temperature and pressure (stp), i.e. at

T = 273 \text{ K}

P = 1.0 \times 10^5 \text{ Pa}

. (2) Determine the density of helium at stp.