a) Đốt cháy hết 5,4g kim loại Y hóa trị III trong oxi thu được 10,2g oxit. Tìm tên kim loại Y. b) Tính thể tích không khí cần dùng để đốt cháy hết 5,6 lit khí metan CH4. Khối lượng các sản phẩm thu được là bao nhiêu? Biết rằng oxi chiếm 1/5 thể tích không khí và các khí đều đo ở đktc giúp mik vs mik đang cần gấp ạ 😖

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I. Find the word to match the definition : Definition : Word 1. small hole within a tooth c. …………………. 2. opposite of dirty c…………………… 3. opposite of heathy u…………………… 4. doctor’s or dentist’s room s………………….... 5. a person looking after our teeth d…………………… 6. arrangement to meet somebody a……………………. 7. make full f……………………. 8. instrument for making holes in a hard place d……………………. II. Use the word in brackets in the correct form to fill in each gap : 1. As a child I was ________________ of the dentist when I visited him ( scare ) 2. Some food is ___________________ and makes our teeth bad ( heathy ) 3. They felt ________________ when he came home late last night ( worry ) 4. I have an _________________ with the doctor tomorrow ( appoint ) 5. The dentist said Mary needed two _______________ (fill ) 6. Try to wait for a few minutes and it’ll stop ___________________ ( hurt ) 7. The nurse is kind and very _________________ ( help ) 8. Don’t touch that tooth . It’s very __________________ ( pain ) III. Use the words in the box to complete the sentences : Planted , wrote , walked , got , ate , washed , stopped , talked 1. Ann _____________ to class yesterday instead of taking the bus 2. I ________________ the dirty dishes after dinner last night 3. The rain _________________ a few minutes ago . The sky is clear now 4. Mr. Wilson _________________ some trees in his garden yesterday morning 5. I ______________ up at eight o’clock yesterday morning 6. Mai and Huong _________________ lunch at the cafeteria two hours ago 7. Mary _____________ to John on the phone last night 8. Sue _______________ a letter to her parents yesterday