问题
选择题
设NA为阿伏加德罗常数，下列叙述中正确的是：
A．常温下11.2L的甲烷气体含有甲烷分子数为0.5NA个
B．标准状况下，11.2L四氯化碳所含分子数为0.5 NA
C．14g乙烯和丙烯的混合物中总原子数为3NA个
D．1L、0.1mol/LH2SO3溶液中含SO32-离子数为0.1NA个
答案
答案：C
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设NA为阿伏加德罗常数，下列叙述中正确的是：
A．常温下11.2L的甲烷气体含有甲烷分子数为0.5NA个
B．标准状况下，11.2L四氯化碳所含分子数为0.5 NA
C．14g乙烯和丙烯的混合物中总原子数为3NA个
D．1L、0.1mol/LH2SO3溶液中含SO32-离子数为0.1NA个
答案：C
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| A: 1__________ B: It is not big but beautiful. A: How many students are there in your class? B. 2_________ What about yours? A: Fifty students. 3_________ B: No, we have ten subjects. A: Then how many hours do you spend on homework every day? B: 4_______ A: That's a little longer. We only need two hours. 5_________ And we have to write reports about the books we read. | |
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