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huong110267
2 năm trước
Khi cho a gam hỗn hợp X gồm Mg, Zn và Fe vào dung dịch H2SO4 dư thu được 3a gam muối sunfat và V lít H2 (đktc). Mặt khác, cho a gam hỗn hợp X vào dung dịch H2SO4 đặc, nóng dư thu được 3,5a gam muối sunfat và 10,08 lít SO2 duy nhất (đktc). Giá trị của V là
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