2.5gNa2S2O3•5H2O(其摩尔质量为248.2g/mol)配制成1升溶液,其浓度(mol/L),约为()。A、0.001B、0.01C、0.1D、0.2

2.5gNa2S2O3•5H2O(其摩尔质量为248.2g/mol)配制成1升溶液,其浓度(mol/L),约为()。

  • A、0.001
  • B、0.01
  • C、0.1
  • D、0.2

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