A.25% | B.75% | C.18% | D.36% |
18K |
24K |
A.MgO | B.Fe(OH)3 | C.FeO | D.Al2O3 |
A.N2O | B.NH4NO3 | C.CO(NH2)2 | D.NH4HCO3 |
A.C2O3中碳元素的质量分数约为33.3% |
B.C2O3具有还原性,属于氧化物 |
C.充分燃烧的产物是CO2 |
D.C2O3能使澄清石灰水变浑浊 |
A.11:7 | B.7:11 | C.1:l | D.2:1 |
A.H2 | B.CH4 | C.C2H2 | D.CO |
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