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(3)
水100gに溶ける限度の量は、109.2gなので、
109.2/(100+109.2)×100≒52%

(4)
水100g20度にとける限界の量は31.6gなので、
109.2-31.6=77.6g

莉緒瑠

ありがとうございました🙇‍♂️

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