đốt cháy 10,8 gam 1 kim lọai M hóa trị III trong ko khí thu đc 20,4 gam oxit 1. xđ tên kim lọai M 2. tính thể tích ko khí cần dùng để đốt cháy hết lượng kim lọai trên 3.tính thể tích dd HCl 2M cần dùng để hòa tan hết lượng oxit tạo thành 4. tính thể tích dd NaCl 25% ( D = 1,25 g/ml) cần dùng để hòa tan hết lượng oxit tạo thành Help

Các câu hỏi liên quan

1. Will you making models in the future? * 1 điểm pick up look for take up find 2. Nowadays people _________ hours sitting in front of computers * 1 điểm take find spend make 3. She is looking ___________ her keys. She haven't seen them since yesterday. * 1 điểm at to for up 4. Hannah bought a __________ of roller skates last month. * 1 điểm second pair single two 5. They participate _________ this competition to gain scores for their class. * 1 điểm at on in to 6. Do you want to join _______us? * 1 điểm with in to X (Không điền gì) 7. I find making models ________________ 1 điểm interested interesting interest 8. I find ____________ wood exciting. * 1 điểm carve carves to carve carving 9. He finds it ___ to solve this problem * 1 điểm easy easily easier 10. My teacher finds it ____ to find out a new solution for this exercise. * 1 điểm simply simplicity simplify simple 11. He won the previous _______________. * 1 điểm elected elects election ellect 12. Your friends are really ____________________. They save the cat from the deep hole. * 1 điểm courage courageous encourage 13. She encourage me _______________ part in swimming competition. * 1 điểm to take takes take taking 14. Sarah bought a huge _______________ of ancient coins. * 1 điểm collect collective collection collects 15. Let's _______________ how this model was made! * 1 điểm imagine imagines imagination 16. Our ________________ can be developed by reading more books. * 1 điểm imagine imagines imagination 17. Taking up a hobby will give you _____________ and help you relax * 1 điểm pleasant pleasure please 18. This class has 40 students. There are 30 students are interested in play badminton. _______________ are fond of swimming. * 1 điểm Others Other students The others The others students 19. I want to __________ my knowledge by studying more about other cultures in the world. * 1 điểm wide widely widen widening 20. Collecting stamps is a boring _______________. * 1 điểm action act activity activities