2Mg + O2 = 2МgO
V(Mg) = 12/24 = 0,5моль
V(O2)=0,25моль
m(O2) = V*M = 0,25 * 32 = 8г.
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2Mg + O2 = 2МgO
V(Mg) = 12/24 = 0,5моль
V(O2)=0,25моль
m(O2) = V*M = 0,25 * 32 = 8г.