Предмет: Химия, автор: ardakzumaseva1

Алюминийдін көміртекпен қосылысындағы массалық үлесі 75%. Осы қосылыстың формуласы кандай?​

Ответы

Автор ответа: dyexfnf
0

Ответ:

Объяснение:

Дано:

w(Al) = 75%

Найти: AlxCy - ?

Найдем массовую часть углерода

w(С) = 100% - w(Al) = 100% - 75% = 25%

Найдем количество вещества каждого элемента

n(C )= w(С)/М(С) = 25 : 12 = 2,08 моль

n(Al) = w(Al)/М(Al) = 75 : 27 = 2,78 моль

n(C ) : n(Al) = 2,08 : 2, 78

индексы должны быть целые числа, поэтому разделим их на меньший, то есть на 2,08

n(C ) : n(Al) = 1 : 1,33

теперь умножим на 3 и получим

n(C ) : n(Al) = 3 : 4

И так формула этого соединения: Al₄C₃ - Карбид алюминия

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