Question

How many oxygen atoms are represented by 0.5 moles of ozone (${\mathrm{O}}_3$)

Answer 1

• Number of atoms in one molecule of ozone = 3
• 1 mole of ozone =$3\times 6.022\times {10}^{23}$oxygen atoms
• Therefore In 0.5 moles of ozone( ${\mathrm{O}}_3$)
• Number of oxygen atoms=$\frac{1}{2}\times 3\times 6.022\times {10}^{23}$

=$9.033\times {10}^{23}$

Therefore the number of oxygen atoms will be $9.033\times {10}^{23}$atoms