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Care este compoziția procentuala a MgSo4 ?

Răspuns :

MMGSO4=AMg+AS+4AO=24+32+4×16=120g
120gMgSO4......24gMg.....32gS.......64gO
100gMgSO4.......xgMg.......ygS...........zgO
x=100×24/120=20%Mg
y=100×32/120=32,66%S
z=100×64/120=53,33%O