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Quynhha
2 năm trước
Cho 87g dd rượu etylic chưa rõ độ rượu, tác dụng với Na lấy dư thì thu đc 28 lít H2 (đktc). a) Tính KL của rượu etylic và nước trong dd b) Tìm độ rượu của dd trên? (biết Dr=0.8g/ml; D nước =1g/ml)
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