Question

A gas cylinder contains exactly 1 mole of oxygen gas (O2). How many molecules of oxygen are in the cylinder?

4.01 × 1022 molecules

6.02 × 1023 molecules

9.03 × 1024 molecules

2.89 × 1026 molecules

Answer 1

6.02 × 10^23 molecules

One mole of any substance contains Avogadro's number of particles, approximately 6.022 × 10^23.