Предмет: Математика, автор: tatyana2704

1)в 700 г спирта раствора йода содержится 119 г иода каково концентрация иода в растворе.2)в200 г раствора соленой воды содержится 56 г соли каково концентрация соли в растворе?

Ответы

Автор ответа: настасья9992
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Fill in the blanks with PRESENT CONTINUOUS or SIMPLE PRESENT
1. The children ………………………….. (play) outside now. *
2. She usually ………………………. (read) the newspaper in the morning. *
3. I …………………………… (do) my homework now. *
4. I ………………………… (eat) my dinner now. *
5. ……………………………. (you / want) a pizza? *
6. They …………………………….. (watch) TV now. *
7. I ……………………………. (not / like) spaghetti. *
8. The baby …………………………. (sleep) now. *
9. My mother usually …………………. (cook) dinner in the evening. *
10. He …………………….. (write) a letter to his pen-friend every month. *
11. She ………………………. (not / like) football. *
12. Mary ………………………….. (listen) to music now. *
13. Tom usually ……………………(drink) coffee, but he …………………. (drink) tea now. *
14. We ………………………. (go) to the disco tonight. *
15. ………………………… (he / go) to work by bus everyday. *
16. Susan usually ………………. (go) to school by bus, but now she …………………….. (go) to school by train.
17. Mary often ……………….. (read) in bed, but today she is very tired and she ………………………. (not / read). *
18. Look! Jane ………………………… (sing) again. She often …………………….. (sing) this song. *
19. My father ………………………………(have) a lot of work to do every weekend. *
20. The girls …………………………………….. (not / talk) now. All of them ………………………… (watch) a film. *
21. …………………… you …………………….. (like) watching TV? *
22. He …………………………………….. (usually / go) at 9:00 o’clock, but this morning he ………………………………….. (leave) home late. *
23. I ……………………………………. (visit) my grandparents every Friday. My sister ………………………………………. (often / visit) them. *
24. The boys …………………………………….. (swim) in the pool now but they ………………………………………… (usually / swim) in the sea. *
25. She ……………………………….(write) a letter to her pen-friend at the moment. *
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26. They …………………………………….. (sometimes / have) lunch at work, but today they …………………………………. (have) at a restaurant. *
27. She can’t talk to you. She ………………………………………. (have) a shower. *
28. “Where …………………………… Alex ……………………… (live)?“In France.” *
29. The children ………………………… (play) the piano and ……………………… (sing) a song at the moment. *
30. My mother ………………………………………. (always / cook) in the morning.