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Gaokao Chemistry Practice Question

2. (6 分) 阿伏加德罗常数的值为 $\mathrm{N}_{\mathrm{A}}$. 下列说法正确的是()

  1. A.$1 \mathrm{~L} 0.1 \mathrm{~mol} \cdot \mathrm{L}^{-1} \mathrm{NH}_{4} \mathrm{Cl}$ 溶液中, $\mathrm{NH}_{4}{ }^{+}$的数量为 $0.1 \mathrm{~N}_{\mathrm{A}}$
  2. B.$2.4 \mathrm{gMg}$ 与 $\mathrm{H}_{2} \mathrm{SO}_{4}$ 完全反应, 转移的电子数为 $0.1 \mathrm{~N}_{\mathrm{A}}$
  3. C.标准状况下, $2.24 \mathrm{LN}_{2}$ 和 $\mathrm{O}_{2}$ 的混合气体中分子数为 $0.2 \mathrm{~N}_{\mathrm{A}}$
  4. D.$0.1 \mathrm{~mol} \mathrm{H}_{2}$ 和 $0.1 \mathrm{~mol} \mathrm{I}$ 于密闭容器中充分反应后, 其分子总数为 $0.2 \mathrm{~N}_{\mathrm{A}}$

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