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Gaokao Chemistry Practice Question

5. $\mathrm{N}_{\mathrm{A}}$ 为阿伏加德罗常数的值, 下列说法正确的是

  1. A.$25^{\circ} \mathrm{C}, 101 \mathrm{kPa}$ 下, $28 \mathrm{~L}$ 氢气中质子的数目为 $2.5 \mathrm{~N}_{\mathrm{A}}$
  2. B.$2.0 \mathrm{~L} 1.0 \mathrm{~mol} \cdot \mathrm{L}^{-1} \mathrm{AlCl}_{3}$ 溶液中, $\mathrm{Al}^{3+}$ 的数目为 $2.0 \mathrm{~N}_{\mathrm{A}}$
  3. C.$0.20 \mathrm{~mol}$ 苯甲酸完全燃烧, 生成 $\mathrm{CO}_{2}$ 的数目为 $1.4 \mathrm{~N}_{\mathrm{A}}$
  4. D.电解熔融 $\mathrm{CuCl}_{2}$, 阴极增重 $6.4 \mathrm{~g}$, 外电路中通过电子的数目为 $0.10 \mathrm{~N}_{\mathrm{A}}$

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