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giahuy6165
2 năm trước
Cho 19,5 gam kẽm tác dụng với hoàn toàn với H2 SO4 đun nóng dư sau phản ứng thu được 6,32 lít khí SO2 và dung dịch x khô cạn dung dịch X thu được m gam muối khan.Tính m
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