Có 4 bình thuỷ tinh khối lượng và thể tích bằng nhau. Mỗi bình đựng một trong các chất khí sau: H2; O2; N2; CO2 ở cùng điều kiện về nhiệt đọ và áp suất. Hãy cho biết: a. Lượng chất (số mol) trong mỗi bình có bằng nhau không? giải thích. b. Số phân tử khí trong mỗi bình có bằng nhau không? giải thích c. Khối lượng khí trong mỗi bình có bằng nhau không? giải thích.

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I. Combine each pair of sentences, using present participle (V-ing) or past participle (V-ed). 1. The boy is Hieu. He is playing football. → The boy________________________________________________________________ 2. TV Sony is very good. It is made in Japan. → Tv Sony_______________________________________________________________ 3. The ruler is Lan’s. It is made of plastic. → The ruler_______________________________________________________________ 4. The girl is painting. She is Lien. → The girl________________________________________________________________ 5. The woman is my teacher. She is talking to the headmaster. → The woman_____________________________________________________________ 6. The road is very large. It joins two cities. → The road_______________________________________________________________ 7. Camera Cannon is made in Viet Nam. It is good and cheap. → Camera Cannon_________________________________________________________ 8. Most of goods are exported. They are made in this factory. → Most of goods___________________________________________________________ 9. The book is mine. It is lying on the table. → The book_______________________________________________________________ 10. The boy will be punished. He broke the shop window. → The boy________________________________________________________________ 11. My family is living in a house. The house was built in 2004. → My family______________________________________________________________