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Консультация № 196353
12.09.2019, 17:57
0.00 руб.
13.09.2019, 09:18
1
3
1
Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
Газовая смесь, состоящая из гелия и водорода, занимает объём (н. у.) 2,24 дм3 и имеет массу 0,240 г. Определите массовую долю водорода в этой смеси.
Газовая смесь, состоящая из гелия и водорода, занимает объём (н. у.) 2,24 дм3 и имеет массу 0,240 г. Определите массовую долю водорода в этой смеси.
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Обсуждение
13.09.2019, 08:41
общий
это ответ
Здравствуйте, svrvsvrv!
Обозначим
-- количества гелия и водорода в смеси соответственно.
2,24 дм3 -- это объём 0,1 моль газа при нормальных условиях [1, с. 14]. Тогда
Молярные массы
гелия и водорода составляют соответственно 
г/моль и 
г/моль. Тогда
Решая систему уравнений (1), (2), получим
моль, 
моль. Значит, массовая доля водорода в смеси составляет
или приблизительно 
%.
Литература
1. Фролов В. В. Химия. -- М.: Высшая школа, 1986. -- 543 с.
Обозначим
-- количества гелия и водорода в смеси соответственно.2,24 дм3 -- это объём 0,1 моль газа при нормальных условиях [1, с. 14]. Тогда
Молярные массы
гелия и водорода составляют соответственно г/моль и г/моль. ТогдаРешая систему уравнений (1), (2), получим
моль, моль. Значит, массовая доля водорода в смеси составляет или приблизительно %.Литература
1. Фролов В. В. Химия. -- М.: Высшая школа, 1986. -- 543 с.
5
Об авторе:
Facta loquuntur.
Facta loquuntur.
13.09.2019, 08:44
общий
Прошу извинить меня за беспокойство! Предлагаю дополнить сообщение, открывающее консультацию, текстом условия задачи, который я набрал ниже.
Газовая смесь, состоящая из гелия и водорода, занимает объём (н. у.) 2,24 дм3 и имеет массу 0,240 г. Определите массовую долю водорода в этой смеси.
Газовая смесь, состоящая из гелия и водорода, занимает объём (н. у.) 2,24 дм3 и имеет массу 0,240 г. Определите массовую долю водорода в этой смеси.
Об авторе:
Facta loquuntur.
Facta loquuntur.
13.09.2019, 09:18
общий
Адресаты:
Сделано.
Об авторе:
We have but faith: we cannot know;
For knowledge is of things we see;
And yet we trust it comes from thee,
A beam in darkness: let it grow.
-----
https://www.linkedin.com/in/andreynkuznetsov
https://www.researchgate.net/profile/Andrey_Kuznetsov11
http://www.researcherid.com/rid/K-8824-2014
We have but faith: we cannot know;
For knowledge is of things we see;
And yet we trust it comes from thee,
A beam in darkness: let it grow.
-----
https://www.linkedin.com/in/andreynkuznetsov
https://www.researchgate.net/profile/Andrey_Kuznetsov11
http://www.researcherid.com/rid/K-8824-2014
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