A sample of oxygen gas contains oxygen atoms

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

Problem

A sample of oxygen gas contains

7.5\times10^{23}

oxygen atoms. How many moles of

\text{O}_2

molecules does the sample contain? (a)

1.25\,\text{mol}

(b)

2.49\,\text{mol}

(c)

0.62\,\text{mol}

(d)

6.2\,\text{mol}