Question

number of atoms in 12 grams of o3

Answer 1

O3 atomic wt=16*3=48u
Molar wt of O3=48g
Number of moles of O3=given wt / molar wt.
=>number of moles=12 /48 =0.25 moles.
Number of molecules = Avogadro number * number of moles
=>number of molecules of O3 = 1.505*10^23.
Number of atoms of oxygen in 1 molecule=3
=>in 0.25 moles of O3 there will be 3*1.505*10^23 atoms of oxygen=>4.515*10^23 atoms.