A.NaHCO3和MgCO3 | B.CaCO3和Na2CO3 |
C.CaCO3和MgCO3 | D.Na2CO3和NaHCO3 |
A.元素的相对原子质量可能是:Z>Y>X |
B.X、Y、Z可能依次是:Hg、Zn、Cu |
C.金属活动性顺序是:Y>X>Z |
D.X、Y、Z可能依次是:Cu、Zn、Hg |
A.245:87 | B.329:100 | C.490:149 | D.87:149 |
A.Mg和Cu | B.Zn和Al | C.Mg和Al | D.Zn和Mg |
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