cho9.4g một oxit kim loại vào 240.6g nước (dư) thu đc 11.2 bazơ a, tìm cthh của oxit Kloại và gọi tên oxit b, tính nồng độ %, nồng độ mol của đd bazơ thu đc. biết khối lượng riêng của đ là 1.25g/ml

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