Bài 4. Cho 2,76 gam hỗn hợp X gồm CaO và FeO phản ứng vừa đủ với 300 gam dung dịch axit H2SO4 1,47% thu được dung dịch Y. a) Tính thành phần phần trăm về khối lượng của các oxit trong hỗn hợp X. b) Tính khối lượng các chất trong dung dịch Y.

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