phản ứng phân hủy kali clorat KCIO3 tạo ra kali clorua KCI và khí O2 a. viết phương trình hóa học của phản ứng b. khi phân hủy 490g KCIO3 sẽ thu đc bao nhiêu lít O2 ở đktc

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I. Change these sentences into PASSIVE VOICE. 1. Does Jack learn English here twice a week? .......................................................................................................................................... 2. Is she making big cakes for the party? .......................................................................................................................................... 3. Has your father repaired the car? .......................................................................................................................................... 4. Must we finish the test before ten? .......................................................................................................................................... 5. Will buses bring the children home? .......................................................................................................................................... 6. Why didn't Huong help Hoa at that time? .......................................................................................................................................... 7. When did they decorate your kitchen? .......................................................................................................................................... 8. How do people pronounce this word? .......................................................................................................................................... 9. How many games has the team played up to now? .......................................................................................................................................... 10. Who looked after the children for you? ..........................................................................................................................................