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48g----32g------80g
x--------y--------8g
x=4,8g
y=3,2g
masa tlenu= 3,2g, a masa magnezu 4,8g
mO=16u
mMgO=40u
2 Mg + O2-------->2 MgO
2*24g----2*16g------2*40g
x-----------y----------8g
48g Mg------80g MgO
xg Mg--------8g MgO
x=4,8g Mg (magnezu)
32g O------80g MgO
yg Mg--------8g MgO
y=3,2g O (tlenu)