Предмет: Химия, автор: Milayalana

Помогите с номерами 32,37 и 2!!! Пожалуйста!!!Очень надо!!!Помогите хорошо сдать химию

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Автор ответа: Аноним

0

2) 3Na2O+2H3PO4 -> 2Na3PO4 + 3H2O
6 моль оксида натрия -> 4 моль фосфата натрия
1 моль Na3PO4 весит 164 г.
164*4= 656

32) С5H10 + Br2 --> C5H10Br2
70 ------160
х ---------6
х = 2,625

125 ---100%
2,625 ---х
х = 2,1%

37) C2H5OH=C2H4+H2O

n(C2H4)=1,12/22,4=0,05моль

n(C2H5OH)=0,05моль

m(C2H5OH)=0,05*46=2,3 г

2,3-100%

х-96%

х=2,208 г

Автор ответа: Аноним

0

правильно?

Автор ответа: Milayalana

0

Спасибо!!!Всех благ!

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