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【单选题】
在 288K 时 H 2 O(l) 的饱和蒸气压为 1702Pa, 0.6mol 的不挥发性溶质 B 溶于 0.540kg H 2 O 时,蒸气压下降 42Pa ,溶液中 H 2 O 的活度系数 γ A 应该为: ()A.
0.9804
B.
0.9753
C.
0.9948
D.
1.005
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