Minekoi

Ответ:

24+32+16*4=120

Mg: 24/120 = 20%

S: 32/120 = 26,67%

O: 64/120 = 53,33%

Объяснение:

Vulcanus

Ответ:

M(MgSO4)=24+32+16*4=120

W(Mg)=24/120=20,2%

W(S)=32/120=26,6%

W(O)=64/120=53,2%

M(NaOH)=23+16+1=40

W(Na)=23/40=57,5%

W(O)=16/40=40%

W(H)=1/40=2,5%

M(SO2)=32+16*2=64

W(S)=32/64=50%

W(O)=(16*2)/64=50%