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quanthikimchi
2 năm trước
Bài 7. Tỉ lệ khối lượng phân tử giữa oxit cao nhất của nguyên tố R so với hợp chất khí với hiđro của nó là 5,5 : 2. Xác định nguyên tố R. Bài 8. Tỉ lệ khối lượng phân tử giữa hợp chất khí với hiđro của nguyên tố R so với oxit cao nhất của nó là 17 : 40. Xác định nguyên tố R.
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