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Gaokao Chemistry Practice Question

2. (6 分) 设 $\mathrm{N}_{\mathrm{A}}$ 为阿伏加德罗常数值. 下列有关叙述正确的是()

  1. A.$14 \mathrm{~g}$ 乙烯和丙烯混合气体中的氢原子数为 $2 \mathrm{~N}_{\mathrm{A}}$
  2. B.$1 \mathrm{~mol} \mathrm{~N}_{2}$ 与 $4 \mathrm{~mol} \mathrm{H}_{2}$ 反应生成的 $\mathrm{NH}_{3}$ 分子数为 $2 \mathrm{~N}_{\mathrm{A}}$
  3. C.$1 \mathrm{~mol} \mathrm{Fe}$ 溶于过量硝酸, 电子转移数为 $2 \mathrm{~N}_{\mathrm{A}}$
  4. D.标准状况下, $2.24 \mathrm{~L} \mathrm{CCl}_{4}$ 含有的共价键数为 $0.4 \mathrm{~N}_{\mathrm{A}}$

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