Предмет: Химия, автор: Kshdvrbskdk

Розставте коефіцієнти в рівняннях реакцій, укажіть реакцію розкладу:
a)Ca+HCl =CaCl2 +H2 б)N2 +O2 =NO
в) Al(OH)3 = Al2O3 + H2O

Ответы

Автор ответа: mireyhayse1210
46

Ответ:

а) Ca+2HCl=CaCl+H2-реакция замещения

б)N2+O2=2NO-реакция соединения

в)2Al(OH)3=Al2O3+3H20-реакция разложения

Объяснение:

Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Английский язык, автор: innabakalu
Решите пожалуйста тесты 1. I can do it … , thank you.
a)         myself   b) herself  
c)  yourself
2. He can’t drive if he doesn’t have a driving …. .
a)  ride b) park   c) licence
3. I … there before. It’s a very nice museum.
a) ‘ve go   b) ‘ve been  c) be
4. Let me … your wrist with this bandage.
a)                 
wrap    b) 
sprain c) break
5. When we got to the campsite we put … our tents.
a) on   b)
into   c) up                           
6. This film is quite … .
a) bored   b) boring   c) bore
7. Look at that boy! He … fall off his bike.
a) is going to   b) will    c) is
8. Bob is very …. . He is an excellent teacher.
a)funny    b) patient   c) noisy
9. I … at my mum’s shop next week.
a) work    b) worked   c) am working
10. You … take photos in the museum. It’s not
allowed!
a) mustn’t  
b) must   c) should


11. Henry took the video game … to the shop because
it wasn’t working.
a)     
off   b) back  
c) away
 
12. The boy … father is a dentist is my friend.
a)                 
whose   b) which  
c) who
 
13. She … the house yesterday.
a) is
leaving   b) left   c) leaves
 
14. …. from the UK!
a)
Greetings    b) Regards  c) Remarks
 
15. I … a new digital camera. I’m sure we’ll take
nice pictures in it.
a)      haven’t bought b) have been buying     c) have bought  
16. When babies are happy, they … .
a) would
smile   b) smile   c) are smiling  
 
17. I saw a … . That was very funny.
а)thriller    b) romance   c) comedy
 
18. If we continue to pollute the environment, many
endangered species … extinct.
a) will
become   b) become   c) are becoming
 
19. We should take the children … for a walk. It’s a
lovely day!
a)
out    b) away   c) off
 
20. I went to Paris
two years … .
a)since   b) before  
c) ago









1. The government is trying a variety of things to …
pollution.
a)                 
burn   b) reduce  
c) emit
 
2. If you’re tired, you should … some rest.
a)
put   b) get   c) have
 
3. If Nick… a new computer, he will let us
use it.
a)
buys   b) bought   c) is buying
 
4. Mike is … Pete. They will both do well in
the exam.
a) most
clever b) cleverer than   c) as clever
as   
 
5. I … my ankle and it really hurts.
a) ‘ve
been twisting b) ‘ve twisted    c) ‘m
twisting  
 
6. You haven’t finished the task, … ?
a) did
you?   b) haven’t you?   c) have you?
 
7.  My
sister finished the exercise by … . Nobody helped her.
a)
herself  b) himself   c) ourselves  
 
8. I won’t do it … you ask me nicely. You
must learn to be polite.
a)
if   b) unless   c) when
 
9. If you exercise regularly, you … have more
energy.
a)
will   b) won’t   c) can’t
 
10. I ……a birthday party next week. It’ll be
fun!
a) are
having   b) is having  c) am having
 


11. Katy was doing her homework while Suzie …
a)  was cooking      b) cooks   c) is cooking
 
12. Boris …, took a shower and went to work.
a) was getting up   b) get up  
c)  got up
 
13. The book … you are reading is very good.
a) who      b) what   c) 
which
 
14. …… when you rang the doorbell?
a) Were
they sleeping …  b) Did they sleep
…   c) Are they sleeping …
 
15. Documentaries are very …
a) interest  
b) interested   c) interesting
16. I was very …. to learn the results of our exams.

a)
interest   b) interested   c) interesting
 
17. He likes to hang …  at the café with his friends.
a)
out    b) in   c) out
 
18. First she did the washing up, … she started her
homework
a)
after   b) as soon as   c) then
 
19. They gave … kick-boxing because they got bored
a)
up    b) away   c) back
 
20.  This is the
girl …. won the swimming competition.
a) which   b) who  c) whose
1 год назад
Предмет: Английский язык, автор: rina2405
Как сказать моя сестра на работе?
1 год назад
Предмет: Русский язык, автор: Розочка14
как выделить грамматическую основу в предложении  я нарочно громко запеваю какую-то несусветицу и марширую в комнату
1 год назад
Предмет: Математика, автор: msorlovanastya
СРОЧНО
в урне 4 белых 6 черных. найти вероятность что второй вытащенный шар окажется белый.
СРОЧНО
8 лет назад
Предмет: Математика, автор: KIRITE2
В киоске 36 маленьких и 48 больших батареек в одинаковых упаковках.Всего 21 упаковка батареек.Сколько упаковок больших батареек в киоске?
8 лет назад