Cho 22,6 g hỗn hợp (Mg, Al, Cu) tác dụng với khí Cl2 dư thu được 43,9g muối. Hỏi nếu cho 22,6g hỗn hợp trên tác dụng với O2 dư thu được bao nhiêu gam oxit. giúp mình với gấp

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