Дробь, Числитель:корень квадратный из 108 Знаменатель 24 корня из 3

Если в течение трёх минут ты чистишь зубы с открытым краном, то вытекает 6 л воды, а если закрываешь кран, когда чистишь зубы, то используешь только 1 л воды. Сколько воды ты сэкономиь за год (365 дней), если будешь чистить зубы дважды в день? 

А: 365л.

Б: 2 190л.

В: 3 650 л.

Г: 1 095л.

Д: 219л. 

Рассчитайте объем водорода(н.у),полученнного при взаимодействии 1,5 моль метанола с металлическим натрием,взятым в достаточном количестве,если объемная доля выхода продукта составляет 85% от теоретически возможного

Fnp. 197. Раскройте скобки, употребляя глаголы в Past Simple или Past Continuous.

1. They (to translate) a difficult text yesterday. 2. I (to open) the window at six o'clock yesterday. 3. You (to go) to the cinema yesterday? 4. I (not to see) Mike last week. 5, When I (to open) the door, my friends (to sit) around the table. 6. When you (to begin) doing your homework yesterday? 7. We (to discuss) the latest news from three till four yesterday. 8. When I (to read) the newspaper yesterday, I (to find) an interesting article on UFOs, 9. Lena (to sweep) the floor on Sunday. 10. Lena (t sweep) the floor from eleven till twelve on Sunday. 11. They (to go) to the wood last Sunday? 12, When they (to sail) down the river they (to see) a little island. 13. We (to work) the whole morning yesterday. 14. Mother (to cook) dinner at three o'clock yesterday. 15. She (to finish) cooking at four o'clock yesterday. 16. At half past four yesterday we (to have) dinner. 17. You (to watch) TV yesterday?  Yes, we (to watch) TV the whole evening yesterday. 18. When you (to go) to bed yesterday? 19. I (to go) to bed at ten o'clock yesterday. 20. At half past ten yesterday I (to sleep). 21. When I (to come) home from school yesterday, my little brother (to sit) on the floor with all his toys around him. He (to play) with them. I (to tell) him to put his toys into the box as he (to make) too much noise.