A.CO>CH4>H2 | B.CO>H2>CH4 | C.H2>CH4>CO | D.H2>CO>CH4 |
m |
16 |
m |
28 |
m |
2 |
A.C3H8 | B.C2H4 | C.H2S | D.N2O4 |
A.同质量不同密度的N2和CO |
B.同温度、同体积的H2和N2 |
C.同体积、同密度的C2H4和C3H6 |
D.同压强、同体积的N2O和CO2 |
1 |
4 |
A.4:5 | B.1:4 | C.8:1 | D.2:7 |
A.体积 | B.原子数 | C.质量数 | D.中子数 |
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