Решите задачу, используя следущие данные: Na2CO3+HCL=NaCL+H2O+CO2 HCL=x моль CO2=44,8л

5.4.Put the following sentences into negative and interrogative forms:

1. Someone is waiting for you in that room.

2. He knows nothing about the arson.-задать 2 вопроса.

3. We know something that can be useful for the investigation of the treason.

4. Everybody approved his conviction.

5. You can find evidence everywhere at the crime scence.

5.3.Read the words, determine what parts of speech they belong to and by means of what suffixes they are formed and translate them into Russian:

darkness, readiness, demonstration, sailor, especially, brightly, weakness, celebration, happiness, examiner, introduction, understandable, agreement, delegation, fatherless, hopeful, nameless, indifferent.

5.6.Read and translate the following sentences using the correct form of the verbs in brackets:

1. We (to find)....... very important evidence during the crime scene search.

2. Is everybody here? - No, one of our divisional inspectors (not to come).......................yet.

3. You anything (to hear).............about the government building arson?

4. He never (to prejudice)................his actions.

5. Why are you here? You are to interview witnesses.- But we already (to do)............................it.

6. Will you call after 3 o'clock? He (to arrive)...........by that time.

7. He already (to interrogate).......................the suspect when I saw him.

в первом коробке 64 кубика когда из неё убрали 29 кубиков то в ней осталось на 15 кубиков меньше чем во второй и третьей коробках вместе сколько кубиков в третьей коробке если во второй 12 кубиков?

Сu (к) + ZnO (к) = СuО (к) + Zn (к)

Докажите , что реакция невозможна

Помогите пожалуйста решить задачи:

1. Написать уравнения реакций, соответствующие следующим схеам:

а) Этан---х---бутан

б) 1-бромпропан---х---Y---2,3-диметилбутан

в) бутан---х---Y---метан

2. Среди пречисленых ниже веществ выбрать пары изомеров:

3-этилпентан, декан, 2,2-диметилпропан, 4-метилгептан,

 2,2,3-триметилбутан .

Заранее огромное спасибо!!!!!