sarahfsakrani
26.07.2021 •
Chemistry
Kim loại thiếc có nhiệt độ nóng chảy là 232 độ C, thiếc hàn nóng chảy ở khoảng 180 độ C. Cho bt thiếc hàn là chất tinh khiết hay có trộn lẫn chất khác nhau?
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