1.在反应2A+5B=2C+4D中C、D的相对分子质量之比为9:22,若2.6gA与B完全反应,生成8.8gD,则在此反应中B与D的质量比为() A.4:9 B.8:1 C10:11 D.31:442.CO与X气体的混合气中氧元素的质量分数为50%,则X气体是
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![1.在反应2A+5B=2C+4D中C、D的相对分子质量之比为9:22,若2.6gA与B完全反应,生成8.8gD,则在此反应中B与D的质量比为() A.4:9 B.8:1 C10:11 D.31:442.CO与X气体的混合气中氧元素的质量分数为50%,则X气体是](/uploads/image/z/4333099-67-9.jpg?t=1.%E5%9C%A8%E5%8F%8D%E5%BA%942A%2B5B%3D2C%2B4D%E4%B8%ADC%E3%80%81D%E7%9A%84%E7%9B%B8%E5%AF%B9%E5%88%86%E5%AD%90%E8%B4%A8%E9%87%8F%E4%B9%8B%E6%AF%94%E4%B8%BA9%EF%BC%9A22%2C%E8%8B%A52.6gA%E4%B8%8EB%E5%AE%8C%E5%85%A8%E5%8F%8D%E5%BA%94%2C%E7%94%9F%E6%88%908.8gD%2C%E5%88%99%E5%9C%A8%E6%AD%A4%E5%8F%8D%E5%BA%94%E4%B8%ADB%E4%B8%8ED%E7%9A%84%E8%B4%A8%E9%87%8F%E6%AF%94%E4%B8%BA%EF%BC%88%EF%BC%89+A.4%3A9+B.8%3A1+C10%3A11+D.31%3A442.CO%E4%B8%8EX%E6%B0%94%E4%BD%93%E7%9A%84%E6%B7%B7%E5%90%88%E6%B0%94%E4%B8%AD%E6%B0%A7%E5%85%83%E7%B4%A0%E7%9A%84%E8%B4%A8%E9%87%8F%E5%88%86%E6%95%B0%E4%B8%BA50%25%2C%E5%88%99X%E6%B0%94%E4%BD%93%E6%98%AF)
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