A.64% | B.50% | C.47% | D.36% |
32×n |
32×n+18×2n |
A.NO | B.N2 | C.N02 | D.N20 |
A.氢氧化铁Fe(OH)2 | B.高锰酸钾K2MnO4 |
C.氧化镁MgO2 | D.硫化钾K2S |
A.1 | B.2 | C.3 | D.4 |
A.FeO2 | B.FeO | C.Fe2O3 | D.Fe3O4 |
A.氧化钙、消石灰、CaO | B.氯化氢、盐酸、HCl |
C.碳酸钙、熟石灰、CaCO3 | D.氢氧化钠、烧碱、NaOH |
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