при сгорании 36 грамм углеводорода . получили 55 грамм CO2 и 27 грамм воды D-возд=(2.48) найти формулу в два способа.срочно!
36г 55г 27г
СхНу+О2-------5СО2+6Н2О
1) М(СхНу)=2,48*29г/моль=71,92г/моль
кол-во вещ-ва(СхНу)=36г/71,92г/моль=0,5моль
кол-во вещ-ва(СО2)=55г/44г/моль=1,25моль
кол-во вещ-ва(Н2О)=27г/18г/моль=1,5моль
Составляем соотношение :
кол-во вещ-ва(СхНу): кол-во вещ-ва(СО2): кол-во вещ-ва(Н2О)
0,5моль 1,25моль 1,5моль /0,5
1моль 2,5моль 3моль *2
1моль 5моль
Расставив коэффициенты возле СО2 и Н2О получаем углерода 5,водорода 6. Но молярная масса не получается=72,значит водорода должно быть 12. получается вещ-во С5Н12-пентан
Автор:
hubbyzbwuДобавить свой ответ
Предмет:
МатематикаАвтор:
kassidynxp3Ответов:
Смотреть
Предмет:
ЛитератураАвтор:
c-dawgqedpОтветов:
Смотреть
СОКРАТИТЬ 2 ТЕКСТАААА СРОЧНООО!УМОЛЯЯЯЮ!
Sung. In 1972, when I was, um maube seven years old, the President of the United States, President Nixon came to my country, came to China. And one of the places he visited was Datong, which was my city. And I was very good at dancing when I was young so I was chosen from my school to dance, to dance in front of the President. And at the end, we were all standing in line and he stopped when he came to me and I remember he smiled and said `Hello`, which was the only English word I knew. And I just said `Welcome`, in Chinese, or course. I still remember it very clearly.
Andy. I met my girlfriend while I was working as a barman in a disco. And there was this really gorgeous girl in the club and I really wanted to talk to her, but I couldn`t because I was working. Anyway as luck would have it, I was carrying a ... a bucket of ice and I dropped it, accidentally, or course, just next to where she was sitting. And well, I said `Oh, I`m so sorry. I`m really, really sorry.` And we started chatting and I found out her name was Karen, and in the end she gave me her phone number. We started going out and we`ve been together for nearly two years.
Предмет:
Английский языкАвтор:
oconnellОтветов:
Смотреть
Первый оператор набрал на компьютере 900 страниц текста за 6 недель, второй столько же за 5 недель. На сколько больше страниц за неделю набирал второй оператор, чем первый, если каждую неделю каждый из них набирал одинаковой количество страниц?
Предмет:
МатематикаАвтор:
daisy3Ответов:
Смотреть