Визначити масову частку оксигену в сполуці молекулярна маса в сполуці його вищого оксиду становить 44кг/моль,елемент знаходиться в четвертій группі в головній підгруппі.
1) Do you like to go to the theatre?2) Which kind of film do you prefer?
1) Do you like to go to the theatre?2) Which kind of film do you prefer?3) Do you like to go to the cinema with friends or alone?
1) Do you like to go to the theatre?2) Which kind of film do you prefer?3) Do you like to go to the cinema with friends or alone?4) Do you like to watch different comedies?
1) Do you like to go to the theatre?2) Which kind of film do you prefer?3) Do you like to go to the cinema with friends or alone?4) Do you like to watch different comedies?5) When is it better to go to the cinema?
1) Do you like to go to the theatre?2) Which kind of film do you prefer?3) Do you like to go to the cinema with friends or alone?4) Do you like to watch different comedies?5) When is it better to go to the cinema?6) Do your parents go with you to the cinema or you watch films at home on TV?
1) Do you like to go to the theatre?2) Which kind of film do you prefer?3) Do you like to go to the cinema with friends or alone?4) Do you like to watch different comedies?5) When is it better to go to the cinema?6) Do your parents go with you to the cinema or you watch films at home on TV?7) With whom you prefer to go to the theatre: with your friends or with your parents?
а) Качественная реакция на многоатомные спирты (с Cu(OH)2):
CH2-OH CH2-O -- (связь к меди)
CH-OH + Cu(OH)2 -> CH-O -- Cu + 2H2O
CH2-OH CH2-OH
Раствор глицерина приобретает ярко-синюю окраску
Ну, или действием CuO на этанол (качественная реакция):
CH3-CH2-OH + CuO->(t) CH3-CHO + Cu + H2O
Т.е., мы опускаем медную проволоку, на которой есть оксид меди(II) и получаем очищенную медь и приятный запах ацетальдегида.
б) Там то же самое только реакция на этиленгликоль немного другая:
CH2-OH CH2-O (связь к меди)
(связь вниз) + CuO -> (связь вниз) Cu + 2H2O
CH2-OH CH2-O (связь к меди)
Надеюсь, это - то, что надо:)
Объяснение:
1) Do you like to go to the theatre?
1) Do you like to go to the theatre?2) Which kind of film do you prefer?
1) Do you like to go to the theatre?2) Which kind of film do you prefer?3) Do you like to go to the cinema with friends or alone?
1) Do you like to go to the theatre?2) Which kind of film do you prefer?3) Do you like to go to the cinema with friends or alone?4) Do you like to watch different comedies?
1) Do you like to go to the theatre?2) Which kind of film do you prefer?3) Do you like to go to the cinema with friends or alone?4) Do you like to watch different comedies?5) When is it better to go to the cinema?
1) Do you like to go to the theatre?2) Which kind of film do you prefer?3) Do you like to go to the cinema with friends or alone?4) Do you like to watch different comedies?5) When is it better to go to the cinema?6) Do your parents go with you to the cinema or you watch films at home on TV?
1) Do you like to go to the theatre?2) Which kind of film do you prefer?3) Do you like to go to the cinema with friends or alone?4) Do you like to watch different comedies?5) When is it better to go to the cinema?6) Do your parents go with you to the cinema or you watch films at home on TV?7) With whom you prefer to go to the theatre: with your friends or with your parents?