Hòa tan hoàn toàn 3,9 g kim loại kali vào H2O sau PƯ thu đc KOH và khí oxi a) Viết PTPƯ b) tính thể tích khí H2 sinh ra , tính khối lượng chất tan tạo thành c) nếu khối lượng nước ban đầu là 95g hãy tính nồng độ dd sau PƯ

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Reduce relative clauses into relative phrases 1. The couple who live in the house next door are both college professors ......................................................................................................................................... 2. The people who are waiting for the bus in the rain are getting wet ........................................................................................................................... 3. Did you get the message which concerned the special meeting ? ..................................................................................................................................... 4. Lan is the second student who entered the classroom this morning ..................................................................................................................................................... 5. The psychologists who study the nature of sleep have made important discoveries ................................................................................................................................................. 6. He was the second man who was killed in this way ............................................................................................................................... 7. Neil Armstrong was the first man who walked on the moon ........................................................................................................................................... 8. I come from a city which is located in the southern part of the country .................................................................................................................................. 9. The vegetables which are sold in this supermarket are grown without chemicals ................................................................................................................................................