A.三聚氰胺中含有氢气和氮气 |
B.三聚氰胺中C、H、N质量比为6:1:14 |
C.三聚氰胺的相对分子质量为126g |
D.三聚氰胺中N的质量分数为84% |
14×6 |
12×3+1×6+14×6 |
点燃 |
A.CO2 | B.SO3 | C.NO | D.CO |
A.食盐:CaCl2 | B.苛性钠:NaOH |
C.纯碱:NaHCO3 | D.生石灰:Ca(OH)2 |
| ||
A.CH3OH | B.CH4 | C.C2H5OH | D.C2H6 |
A.银和水银 | B.冰和干冰 |
C.金刚石和石墨 | D.苛性钠和烧碱 |
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