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Gaokao Chemistry Practice Question

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

  1. A.$1.8 \mathrm{~g}^{18} \mathrm{O}$ 中含有的中子数为 $\mathrm{N}_{\mathrm{A}}$
  2. B.$28 \mathrm{~g} \mathrm{C}_{2} \mathrm{H}_{4}$ 分子中含有的 $\sigma$ 键数目为 $4 \mathrm{~N}_{\mathrm{A}}$
  3. C.标准状况下, $22.4 \mathrm{~L} \mathrm{HCl}$ 气体中 $\mathrm{H}^{+}$数目为 $\mathrm{N}_{\mathrm{A}}$
  4. D.$\mathrm{pH}=12$ 的 $\mathrm{Na}_{2} \mathrm{CO}_{3}$ 溶液中 $\mathrm{OH}^{-}$数目为 $0.01 \mathrm{~N}_{\mathrm{A}}$

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