問題詳情
20．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)14g乙烯和丙烯的混合物中总原子数为3NA个
(C)0.1mol/L的氢氧化钠溶液中含钠离子数为0.1NA个
(D)5.6g铁与足量的稀硫酸反应失去电子数为0.3NA个
(A)常温下11.2L的甲烷气体含有甲烷分子数为0.5NA个
(B)14g乙烯和丙烯的混合物中总原子数为3NA个
(C)0.1mol/L的氢氧化钠溶液中含钠离子数为0.1NA个
(D)5.6g铁与足量的稀硫酸反应失去电子数为0.3NA个
參考答案
答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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