Предмет: Химия, автор: Стриж

Закончить уравнения реакции, записать их в ионно-малекулярной форме

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Автор ответа: тайная
0

Б) 3NaBiO3 + 2Cr(NO3)3 + 4HNO3 = 3Bi(NO3)3 + Na2Cr2O7 + NaNO3 + 2H2O

3Na[+] + BiO3[-] + 2Cr[3+] +6NO3[-] + 4H[+] + 4NO3[-] = 3Bi[3+] + 9NO3[-] + 2Na[+] +Cr2O7[2-] + Na[+] + NO3[-] + 2H2O

BiO3[-] + 2Cr[3+] + 4H[+]= 3Bi[3+] +Cr2O7[2-] + 2H2O

 

Г) 3SO2 + NaJO3 + 3H2O = 3H2SO4 + NaJ

3SO2 + Na[+] + JO3[-] + 3H2O = 6H[+] + 3SO4[2-] + Na[+] + J[-]

3SO2 + JO3[-] + 3H2O = 6H[+] + 3SO4[2-] + J[-]

остальные сообразить не могу ((

 

 

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Предмет: Английский язык, автор: dmitrii2002rakhmatul
Английский язык. Тест.
ВЫБЕРИТЕ ПРАВИЛЬНЫЙ ВАРИАНТ.

1. My sister Juliet … the paper at the moment.
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A. are B. beC. is

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4. I … you. What language are you speaking?
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A. are B. –C. be

6. I … to go to school now.
A. get ready B. getting ready C. am getting ready

7. My friend … tomorrow. I am going to the airport to meet him.
A. be come B. comeC. is coming

8. It can’t be true! I … you!
A. am not believing B. not believeC. do not believe

9. I … again tonight!
A. am not cooking B. do not cook again tonight C. not cook

10. Please, be quiet. You … a lot of noise.
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A. am not recognizing B. be not recognizing C. do not recognize

12. I … to a new flat at the weekend. Perhaps you can help me.
A. move B. am moving C. be moving

13. I … this word. What does it mean?
A. do not know B. am not knowing C. not know

14. This hotel is awful. I … never … here again.
A. –… stay B. be … staying C. am … staying

15. –Hello. Can I speak to Ann, please? –I’m afraid not. She … a shower at the moment.
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16. She … constantly … about her problems!
A. is … talking B. are … talking C. am … talking

17. Cities … bigger and bigger every year.
A. grows B. is growing C. are growing

18. I … football with John next Saturday.
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19. It has stopped raining. The sun … .
A. is shining B. shining C. be shining

20. Bill is sick but he … better slowly.
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