1.рассчитайте обьем водорода,полученного при взаимо действии железа массой 112г.избытком соляной кислоты.уравнение хим.реакции Fe+HCI=FeCI2 +H2.
2.найдите массу гидроксида железа(III), если при его разложении образовался оксид железа (III)массой 180г.и вода

Розвяжіть ребус abcd+abc+ab+a=2013

1)(1-log 35 по основанию 5) - (log 35 по основанию 7)

2) 4sinx^2-3/2cos-1=0

3)Периметр прямоугольной трапеции описанной около окружности равен 86  Ее ольшая боковая сторона 27. Найдите радиус окружности

4)Высота цилиндра 12 диагональ осевого сечения образует угол в 45 градусов. Найти радиус основания.

5)Диагональ грани куба 3 корень из 2 . Найти обьем куба

ПОМОГИТЕ ПОЖАЛУЙСТА ОЧЕНЬ НУЖНО И СРОЧНО....ГРАММАТИКА...HELP ME PLEASE....

1. You should read this novel — it’s been ……… recommended by all the critics.

a) truly
b) highly
c) fully
d) deeply

2. If only I .... to the barbecue instead of staying at home.

a) went
b) had gone
c) did go

3. When Sam was a small child, he ……… spend hours every day playing with stones in the garden.

a) would
b) was
c) should
d) used

4. It's no use .... to him. He doesn't listen.

a) to speak
b) spoke
c) speaking

5. I really didn't want to come last night.

a) So do I
b) Neither do I
c) Neither I did
d) Neither did I

6. Unfortunately, Mary has ……… friends in Tacoma.

a) a few
b) few
c) some
d) many

7. Where was Jack yesterday? - I don't know. He ________________ seeing the doctor.

a) might has been
b) might have been
c) couldn't have been
d) mustn't have been

8. The train ___ from platform 8 goes to Liverpool.

a) departed
b) depart
c) departing
d) departs

9. They arrived  ___ we were having dinner.

a) while
b) why
c) during
d) for

10. My parents hope that I'll _____________________ and start being obedient again.

a) change my opinion
b) think
c) change my mind
d) be aware

ПОМОГИТЕ КТОНИТЬ!!!

Найти производную

ПОДРОБНО!

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