欲配製1 升0.5 mM \mathrm{CuSO}_{4}(分子量160)溶液,需秤多少毫克(mg)的CuSO4‧\mathrm{5H}_{2}O?
\mathrm{CuSO}_{4}
\mathrm{5H}_{2}
51
80
125
320