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Hòa tan m gam kim loại Cu trong dung dịch HNO3 loãng, dư. Sau phản ứng thấy thoát ra 4,48 lít khí NO (ở đktc). Tính m ?
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Hòa tan m gam kim loại Cu trong dung dịch HNO3 loãng, dư. Sau phản ứng thấy thoát ra 4,48 lít khí NO...
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