Вычислить объм газа выделевшегося при разложении 20г известняка содержащего 10% посторонних примесей. найти массу чистого сасо3. найти количество вещества сасо3

Масса чистого сасо3: 20 г *(100-10)%/100% = 18 г. молекулярная масса сасо3 = 100 г/моль количество вещества сасо3: 18 г/100 г/моль = 0,18 моль уравнение реакции разложения: сасо3 = сао + со2 составляем пропорцию: 100 г сасо3 при разложении выделяет 22,4 л со2 18 г сасо3 при разложении выделяет х л со2 находим х: х=18 г *22,4 л/100 г=4,032 л. ответ: объем газа, выделившегося при разложении - 4,032 л; масса чистого сасо3 в известняке - 18 г количество сасо3 0,18 моль.

Составьте предложения со словами:
Do archery, miss flight, climb walls, walking, run out of cash, buy souvenirs, get a flat tyre, visit historic sites, try local food, car break down, lose luggage, have your wallet stolen, learn scuba diving.
II. Выберите правильный вариант: Future Simple, to be going to, Present Continuous, Conditionals, Might/Could, will probably, will definitely.

1. The tourists ... wind-surfing to the coast in summer.
a) Are going
b) Will go
c) Go
2. I don’t think we … a quad bike. It’s too dangerous.
a) are driving
b) drive
c) will drive
3. We … tonight.
a) eat
b) will eat
c) are eating
4. My parents … to London in an hour.
a) will fly
b) fly
c) are flying
5. I … to take scuba diving lessons.
a) am going to
b) is going to
c) will
6. If the weather is fine, we … .
a) will sunbathe
b) sunbathe
c) sunbathes
7. If you mix red and white, you … pink.
a) will get
b) gets
c) get
8. There is no news from him. He … still be in the holiday camp.
a) could
b) might
c) may
9. The flight from the USA to Japan will … be expensive.
a) could
b) definitely
c) probably
III. Выбери правильный вариант.
1. How can I help you?
2. What would you like to know?
3. How much does it cost to get in?
4. Can I help you with anything else?
5. What is the best way to get there by car?
a) Just head for Twin Peaks town centre on TE-50 and continue straight.
b) No, I think that’s all, thank you.
c) What are the opening hours?
d) It’ 5$ adults and 2.50$ for children.
e) I’m calling for some information.