Предмет: Химия, автор: sanya12345678890

в результате реакции термохимическое уравнение котоорой
c+o2=co2+393кдж
выделилось 786 кдж теплоты . Количество вещества кислорода равно ___?

Ответы

Автор ответа: kamilakulieva

7

C + O2 = CO2 + 393 кДж
1 моль 393 кДж - по уравнению
х моль 786 кДж - по условию задачи

х=1х786/393=2 моль

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