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2 năm trước
Cho 33,6 gam sắt vào dung dịch H2 SO4 đặc, nóng, dư thì tạo thành V lít khí SO2 ở điều kiện chuẩn( sản phẩm khử duy nhất ).Tính khối lượng quặng pirit chứa 80% FeS2 cần dùng tối thiểu là bao nhiêu để tạo ra Lượng SO2 trên.
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