kastyukovets Mr(O2)= 16 * 2= 32
m(O2)=M(O2)/N(А)= 32г/моль /6.02*10⁻²³ =5,3*10⁻²³г
5,3*10⁻²³ * 2 = 10.6*10⁻²³

Mr(O3)=48
m(O3)=48/6.02*10⁻²³ =8*10⁻²³