A.④ | B.③ | C.② | D.① |
5.4g |
18g/mol |
5.6L |
22.4L/mol |
N |
NA |
3.01×1023 |
6.02×1023 |
m |
M |
19.6g |
98g/mol |
A.2molCH4 | B.标准状况下67.2LNH3 |
C.1.204×1024个H3PO4 | D.10gH2 |
A.2:5 | B.5:2 | C.1:5 | D.5:1 |
A.质量相等的O2和O3中所含原子数相等 |
B.物质的量相等的O2和O3中含分子数相等 |
C.质量相等的SO2和SO3中所含硫原子数之比为5:4 |
D.物质的量相等的SO2和SO3中含氧原子数之比为3:2 |
A.10 | B.20 | C.50 | D.500 |
A.FeO | B.Fe2O3 | C.Fe3O4 | D.Fe4O5 |
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