Question

number of oxygen atoms in 8 gram of ozone is

Answer 1

take the number of moles in oxygen and multiply it by Avogadro's number.
1 molecule if ozone has 3 moles thus, calculate it with this and you'll definitely get the answer.

Answer 2

2O3 -----> 3O2


So 96 g of o3 gives 3 mole of oxygen


1g of ozone gives 3 ÷ 96 mole of oxygen


8g of ozone gives 3 ×8÷ 96 moles of oxygen

Moles of oxygen = 0.25 mole

Number of oxygen atom = mole × Na
1 moles of oxygen has 2 oxygen atom


So 0.25 moles of oxygen have 2 × 0.25 atom of oxygen


Atom of oxygen = 0.5 atoms
This can be answer


But in avagadro number
It ans is
O.5 × 6.02× 10^ 23
3.01 × 10^ 23 = atom of oxygen


Hope it helps