已知25%氨水的密度为0.91g/cm3,5%氨水的密度为0.98g/cm3,若将上述两

 已知25%氨水的密度为0.91g/cm35%氨水的密度为0.98g/cm3,若将上述两溶液等体积混合,所得氨水溶液的质量分数是

A.等于15%    B.大于15%    C.小于15%    D.无法判断

答案

B

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