0.5mol*(13+4+35.5)g/mol=26.25g
0.16mol*(39+35.5)g/mol=11.92g
0.24mol*(39+32+16*4)g/mol=32.4g
根据差量法减少的体积 3-(2+1)=0
所以气体体积不变
故有氧气672ML
有氧气体积可计算出氧气质量,根据质量守恒可算出xy2质量( 2.56*672/22.4/1000-672/22.4/1000*32) 氧气含有(672/22.4/1000)MOL则XY2含有(672/22.4/1000/3)MOL
有摩尔质量76g/mol
76/(16+3)*3=12g/mol 是C
同理是S