2Ca + O2 → 2CaO
n(Ca) = 12/40 = 0.3 моль
По уравнению реакции n(O2) = n(Ca)/2 = 0.3/2 = 0.15 моль
V(O2) = 0.15*22.4 = 3.36 л
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2Ca + O2 → 2CaO
n(Ca) = 12/40 = 0.3 моль
По уравнению реакции n(O2) = n(Ca)/2 = 0.3/2 = 0.15 моль
V(O2) = 0.15*22.4 = 3.36 л