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氧氣32克氫氣4克
2H2O=2h2+o2 4.5 x 36 4 x=0.5g n=m/M=0.5/2=0.25mol V=Vm乘n=22.4 l/mol乘0.25mol=5.6 l 對了,你們沒學過 看不懂換一個 V=M/P=0.5g/0.09g/l=5.56 l
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