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tamm7833
2 năm trước
hợp chấtt x được dùng trong công nghệ sản xuấtt thủy tinh,xử lý nc hồ bơi,chấtt tay rửa,... xác định công thức hóa học của hợp chất x ,biết tỷ lệ khối lượng của các ng tố trong x la Na:C:O=23:6:24
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