1.在标况下,①6.72L CH₄,②0.5mol HCL分子,③13.6g H₂S,④0.2mol NH₃,这四种气体的密度关系表达为?2.称取M g Na₂CO₃固体恰好和20mL 盐酸作用,反应生成CO₂、H₂O及NaCl,则这种盐酸的物质的量浓度为_____百度作业帮
1.在标况下,①6.72L CH₄,②0.5mol HCL分子,③13.6g H₂S,④0.2mol NH₃,这四种气体的密度关系表达为?2.称取M g Na₂CO₃固体恰好和20mL 盐酸作用,反应生成CO₂、H₂O及NaCl,则这种盐酸的物质的量浓度为____
2.称取M g Na₂CO₃固体恰好和20mL 盐酸作用,反应生成CO₂、H₂O及NaCl,则这种盐酸的物质的量浓度为____⑴如果上述M g Na₂CO₃中实际混有少量NaCl,那么这种盐酸的实际浓度比上面的数值要____⑵如果上述M g Na₂CO₃中实际混有少量K₂CO₃,那么这种盐酸的实际浓度比上面的数值要____⑶如果上述M g Na₂CO₃中实际混有少量NaOH,那么这种盐酸的实际浓度比上面的数值要____
（1）密度比为相对分子质量比因为一摩尔气体在标准状态下体积相同（2）M/106 摩尔碳酸钠 反应掉M/53摩尔盐酸混有氯化钠则 偏低偏低偏高
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L&M Hardware Co.,Ltd. is a professional manufacturer and exporter in China, we specialize in US type T posts and clips, U posts, Australia
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