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用NA表示阿伏加德罗常数的值。下列叙述正确的是A.1molFe与足量的S反应转移电子数为3NAB.标况下,22.4L乙醇含有共价键数目为8NAC.常温下,98gH2
用NA表示阿伏加德罗常数的值。下列叙述正确的是A.1molFe与足量的S反应转移电子数为3NAB.标况下,22.4L乙醇含有共价键数目为8NAC.常温下,98gH2
发布时间:2020-08-04 21:06:17
用NA表示阿伏加德罗常数的值。下列叙述正确的是A.1molFe与足量的S反应转移电子数为3NAB.标况下,22.4L乙醇含有共价键数目为8NAC.常温下,98g H2SO4和H3PO4的混酸中所含的分子数为NAD.25℃时,pH=12的氨水中,OH-的数目为0.01NA
网友回答
C解析硫的氧化性比较弱 和铁反应生产FeS,1mol铁失去2mol电子。乙醇在标准状况下不是气体。硫酸和磷酸的相对分子质量相同,都是98,C正确。D中没有告诉溶液的体积,无法计算离子的个数。
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