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NguyenBich
2 năm trước
nguyên tử sắt có 26p 30n 26e: a) Tính khối lượng nguyên tử sắt b) Tính khối lượng e trong 1kg sắt Lưu ý không áo dụng công thức tính mol nha k có kiểu 1000/56 đâu nhé =)))
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