A.物质的量浓度为\(\rm{0.5}\) \(\rm{mol/L}\)的\(\rm{MgCl}\) \(\rm{{\,\!}_{2}}\)溶液中,共含有\(\rm{Cl}\) \(\rm{{\,\!}^{-}}\) 个数为 \(\rm{N}\) \(\rm{{\,\!}_{A}}\) |
B.\(\rm{1mol}\)任何气体的体积都为 \(\rm{22.4L}\) |
C.\(\rm{7.8gNa}\) \(\rm{{\,\!}_{2}O}\) \(\rm{{\,\!}_{2}}\)中所含阴离子的数目是\(\rm{0.1N}\) \(\rm{{\,\!}_{A}}\) |
D.标准状况下,\(\rm{2.24L}\)水中含有的分子数为\(\rm{0.1N}\) \(\rm{{\,\!}_{A}}\) |