Рассчитайте количество вещества нитрата меди ( II) полученного при взаимодействии 16 г оксида меди (II) С АЗОТНОЙ кислотой массой 31,5 г

СuO + 2 HNO3 = Cu(NO3)2 + H2O

Раскройте скобки, употребляя глаголы в соответствующей форме.
1. If you (go out) … in cold weather without a coat, you would catch a cold.
2. The dish would have been much more tasty if she (to be) a better cook. 
3. He never (to phone) you if I hadn’t reminded him to do that. 
4. Your brother (to become) much stronger if he took cold baths regularly. 
5. If the weather is fine, we (go) for a picnic.
6. If the fisherman had been less patient, he (not to catch) so much fish.
7. If you sent the letter by first class mail, it (get) … there the following day.
8. If I (to know) the result now, I would phone her immediately. 
9. If you had let me know yesterday, I (to bring) you my book. 
10. If you did not drive carefully, you (have) … an accident.

решите,плиз,138/х+57=126

решить задачу из неподвижной лодки,масса которой 80 кг,прыгает на берег девочка. масса девочки 40кг,скорость еёпри прыжке 2м/с.какую скорость приобрела лодка