Câu 8: Một hợp chất có phân tử gồm 2 nguyên tử nguyên tố A liên kết với 3 nguyên tử Oxi và nặng hơn nguyên tử Cacbon là 8,5 lần. a. Tính PTK của hợp chất? b. Tính NTK của A, cho biết tên và KHHH của A?

II. Write a comparative sentence using the information and the word in brackets. 1. The average rainfall in Arica, Chile is 0.76mm per year. The average rainfall in the Libyan Sahara Desert is less than 15mm per year. (dry) Arica, Chile________________________________________________________________ 2. Henry arrived at the meeting at 7 o’clock. I arrived at 6:45. (soon) I ________________________________________________________________________ 3. It costs 100 million dong to build a concrete bridge, but only 50 million dong to build a steel bridge. (expensive) Building a concrete bridge ____________________________________________________ 4. It takes Linh 45 minutes to load hay onto the cart, but his father needs only 30 minutes. (slowly) Linh______________________________________________________________________ 5. His house’s yard is about 100 square meters while your house’s yard is about 50 square meters. (large) His house’s yard ____________________________________________________________ 6. It was very difficult to travel to the town 5 years ago. Now people can drive a car or take a bus to the town. (easily) People can travel____________________________________________________________ 7. I do yoga three times a week, but my sister does it almost every day. (frequently) My sister __________________________________________________________________ 8. The Australian athlete jumped 8.78m. The American athlete jumped 8.59m. (far) The Australian athlete________________________________________________________ 9. Red River is 1.149 km long. Mekong River is 4.350km long, (long) Mekong River ______________________________________________________________ 10. A horse can run 80km/h while a dog can run 50km/h. (fast) A horse ___________________________________________________________________ (các bn ơi giúp mik với)

1. The average rainfall in Arica, Chile is 0.76mm per year. The average rainfall in the Libyan Sahara Desert is less than 15mm per year. (dry)