A mixture of of hydrogen and of helium at NTP has a density of about

CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance

Problem

A mixture of

4\text{ g}

of hydrogen and

8\text{ g}

of helium at NTP has a density of about (1)

0.22\text{ kg/m}^3

(2)

0.62\text{ kg/m}^3

(3)

1.12\text{ kg/m}^3

(4)

0.13\text{ kg/m}^3