1x 1.12 L得:2∶1=x∶1.12 L,x=2.24 L>1.12 L,O2过量。设生成水的质量为y。由2H2 O2https://bgk-photo.cdn.bcebos.com/9213b07eca806538ae97277387dda144ad348255.jpg2H2O44.8 L 36 g1.12 L y得:44.8 L∶1.12 L=36 g∶y,y=0.9 g。