Помогите посчитать AI2O3; SO2; H2SO4 по формуле( на фото) Срочно!!!!

M(Al2O3)=27*2+16*3=102 g/mol
W(AL)=27*2/102*100=53
W(O)=16*3/102*100 = 47
 
M(SO2)=32+16*2 = 64 g/mol
W(S) = 32/64*100 = 50
W(O2)=16*2/64*100 = 50

M(H2SO4)=1*2+32+16*4=98 g/mol
W(H)=1*2/98*100=2.04
W(S)=32/98*100=32.65
W(O)=16*4/98*100=65.31

W(Al) = 53
W(O) = 47

W(S) = 50
W(O) = 50

W(H) = 2 
W(S) = 32
W(O) = 65