2楼: Originally posted by hl16010921 at 2013-09-26 13:11:16
0.620/44*12=0.169g 0.254/18*2=0.028g
0.432-0.169-0.028=0.235g
0.235/16=0.0147
0.169/12=0.0141
c:h等于1:2:1.05。如果实验误差允许达到5%，那么可以认为和糖的实验式一致，否则不一致

3楼: Originally posted by ynkuaile at 2013-09-26 14:00:45
糖的实验式（CH2O）n或者Cn(H2O)m.
Cn(H2O)m+nO2→nCO2+mH2O
0.423                 0.620    0.254          △=0.451g(氧气质量)  =0.0141mol   
                    0.0141mol   0.0141mol   
n=m=0.0141 ...