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manh.ngan.596
2 năm trước
Cho a1 g Na tác dụng với bg nước được dd xút có nồng độ C%. Cho a2 g Na2O tác dụng với bg nước thu được dd xút có cùng nồng độ C% a. Xác định mối quan hệ giữa a1, a2 và b b. Cho a1 = 4,6; b = 20. Xác định a2 và nồng độ C%.
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