Предмет: Химия, автор: sopcveti

k2co3+naoh ионное уравнение​

Ответы

Автор ответа: tkachenkonacsya
0

Відповідь:

Они не будут взаимодействовать, так как при их взаимодействии образуется гидроксид калия и карбонат натрия, которые так же будут взаимодействовать между собой, образуя исходные вещества.

Пояснення:

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ДАЮ 65 БАЛЛОВ

8 класс Проверочная работа

I. Fill in the missing word.

test, fixed, forecast,, generation, review, headlines, gadgets

1. The younger … are obsessed with new technology.

2. Did you see the … in today’s newspaper?

3. The weather … for tomorrow is predicting heavy rain. Maybe we should cancel our plans for a picnic

4.Our teacher asked us to write a(n).... of the film, as homework.

5. Tom had his eyes …… on Nina the whole evening.

6. My brother passed his driving … yesterday.

7. John has a lot of ….. but his favorite is a laptop.

II. Put the words into the correct order.

1. round / work / have to / farmers / the year / all.

2. you / not / hospital / noise / must / make / in.

3. your / look / could / passport / I / at ?

4. not / jeans / you / must / wear / to / school.

5. didn’t / you / drink / have to / much / yesterday / so.

6. too much / you / salt / and / eat / sugar / shouldn’t.

7. do / get / to / Turkey / I / have to / a visa ?

8. needn’t / you / complain.

III. Choose the proper variant.

1.​ Take an umbrella. It … (may/can) rain.

2.​ You … (could/should) stop smoking. You know you … (cannot/must not) buy health.

3.​ You … (must not/needn’t) read in the dark.

4.​ The fridge is full, so we … (must not/needn’t) go shopping.

5.​ I … (may not/can’t) watch this film. It’s too boring.

6..​ We’ve got a dishwasher, so you … (couldn’t/needn’t) do the washing up.

7.​ You look very pale, I think you … (must/should) stay at home.

8.​ (Could/Might) you, please, pass me the mustard?

9. What time do we ….. (must/have to) be at the railway station?

IV.​ Choose the correct variant to say in an other way.

1.​ It is forbidden to use mobile phones in the classroom.

a)​ You don’t have to use your mobile phone in the classroom.

b)​ You mustn’t use your mobile phone in the classroom.

2.​ It’s possible that our Arts teacher will be away tomorrow.

a)​ Our Arts teacher must be away tomorrow.

b)​ Our Arts teacher may be away tomorrow.

3.​ It isn’t necessary for you to join your school’s drama club.

a)​ You don’t have to join your school’s drama club.

b)​ You mustn’t join your school’s drama club.

V. Choose the correct response.

1. What’s the best way to do better in my exams? ___ A That’s the spirit.

2. How did you do in your maths test? ___ B You could revise more often during

the year.

3. I’ll try my best to pass the history test next time. ___ C Pretty well.

4. Why don’t you get a full-time job and go to evening school?__ D How come?

5. Tom’s decided to postpone his studies for a year. __ E That’s easier said than done.