Question

A gas cylinder contains exactly 15 moles of oxygen gas (O2). How many molecules of oxygen are in the cylinder?

Answer 1

Answer: Option (c) is the correct answer.

Explanation:

According to Avogadro, there are $6.022 \times 10^{23}$ atoms per molecule in one mole of a substance.

Therefore, in 15 moles of oxygen gas calculate the molecules of oxygen as follows.

         $6.022 \times 10^{23} \times 15$

     = $90.33 \times 10^{23}$ molecules

     = $9.03 \times 10^{24}$ molecules

Thus, we can conclude that there are $9.03 \times 10^{24}$ molecules in 15 moles.