Physics, 15.09.2021 06:00 dfrtgyuhijfghj3496
có 1 hỗn hợp vàng, kẽm, bạc. Hãy nêu cách tác 3 kim loại đó ra, cho biết:nhiệt độ nóng chảy của 3 chất vàng, kẽm, bạc lần lượt là 1064 độ C,420 độ C,960 độ C.
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có 1 hỗn hợp vàng, kẽm, bạc. Hãy nêu cách tác 3 kim loại đó ra, cho biết:nhiệt độ nóng chảy của 3 ch...
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