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2 năm trước
Hòa tan một lượng Zn vào dung dịch HCl ( vừa đủ) thu được 5,6 lít H2 ở đktc a. Tính khối lượng Zn đã phản ứng? b.Tính C% của dung dịch HCl biết khối lượng dung dịch HCl tham gia phản ứng là 200gam
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