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Gaokao Chemistry Practice Question

$N_{\mathrm{A}}$ 代表阿伏加德罗常数的值。下列说法正确的是

  1. A.$1 \mathrm{molHC} \equiv \mathrm{CH}$ 分子中所含 $\sigma$ 键数为 $5 N_{\mathrm{A}}$
  2. B.$1 \mathrm{~L} 0.1 \mathrm{~mol} \cdot \mathrm{L}^{-1}$ 的 $\mathrm{Na}_{2} \mathrm{CO}_{3}$ 溶液含 $C O_{3}^{2-}$ 的数目为 $0.1 N_{\mathrm{A}}$
  3. C.$78 \mathrm{~g} \mathrm{Na}_{2} \mathrm{O}_{2}$ 与足量水完全反应, 电子转移数为 $N_{\mathrm{A}}$
  4. D.标准状况下, $2.24 \mathrm{~L} \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}$ 所含氢原子数为 $0.6 \mathrm{~N}_{\mathrm{A}}$

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