2H2O2= MnO2=2H2O+O2↑
68 36 32
68:36:32=17:9:8
CaCO3+2HCl=CO2↑+H2O+CaCl2
100 73 44 18 111
100:73:44:18:111
Fe+CuSO4=Cu+FeSO4
56 160 64 152
56:160:64:152=7:20:8:19
2NaOH+H2SO4=2H2O+Na2SO4
80 98 36 142
80:98:26:142=40:49:18:71
3Fe+2O2= 点燃=Fe3O4
168 64 232
168:64:232=21:8:29
3CO+Fe2O3= 高温=3CO2+2Fe
84 160 132 112
84:160:132:112=21:40:33:28