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toanthuha
2 năm trước
Tinh thể CsI có cấu trúc kiểu CsCl với cạnh a = 0,445nm. Bán kính của ion Cs+ là 0,169 nm. Khối lượng mol của CsI là 2,59,8 g.mol-. Hãy tính: a) Bán kính của ion I- ? b)Tính độ dặc khít của mạng tinh thể CsI? c) Tính khối lượng riêng của CsI?
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MIXED CONDITIONALS EXERCISES. Complete the following sentences with the words in brackets. 1. If it doesn't_______________ (rain), plants cannot grow. 2. If I _______________ (try) to cook, I ruin the food. 3. If you smoke, your skin _______________ (age) more quickly. 4. If you heat ice, it _______________ (melt). 5. I feel good if you _______________ (visit) me regularly. 6. Water evaporates if you _______________ (boil) it. 7. Deren _______________ (cycle) to work if the weather is good. 8. I feel sick if I _______________ (eat) too much chocolate. 9. You need to take my sister to the hospital if she _______________ (drink) milk as she is allergic to it. 10. If Andy _______________ (go) to bed late, he cannot wake up early. 11. If I don't do my homework, my teacher _______________ (get) angry. 12. If I _______________ (be) taller, I _______________ (join) in NBA when I was young. 13. Do you think you _______________ (be) happier now if you (be) someone else. 14. Lucas _______________ (be) in Los Angeles now if he _______________ (take) the flight yesterday. 15. The teacher _______________ (be) so angry now if you _______________ (forget) your homework at home. 16. If you _______________ (go) your office early, you _______________ (be) with us now. 17. I cannot _______________ (see) well if I don't have my glasses. 18. If you study hard enough, you _______________ (get) very good grades. 19. If somebody makes noise in the library, our teacher _______________ (punish) them. 20. If I miss the bus, I _______________ (take) a cab. 21. Coffee _______________ (taste) better if you add sugar. 22. You should _______________ (eat) less if you want to lose weight. 23. I always take my umbrella with me if it _______________ (rain). 24. If you _______________ (press) that button, the car starts. 25. If you _______________ (break) anything, you pay for it. 26. A: We had a great time at Drew's house Sunday. Why didn't you come? B: I had to study for Spanish. A: If you _______________ (come) with us, you _______________ (see) an awesome movie.

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