дано
V(газа) = 150 м3
W(O2) = 78%
W(NO2) = 12%
W(C)=8%
W(He) = 2%
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V(O2)-? , V(NO2)-? , V(C)-? , V(He)-?
V(O2) = 150*78% / 100% = 117 m3
V(NO2) = 150*12% / 100% = 18 m3
V(C) = 150*8% / 100% = 12 m3
V(He) = 150*2% / 100% = 3m3
ответ 117 м3, 18 м3 , 12 м3, 3 м3