Предмет: Химия, автор: good36g5

очень срочно пж!!!!!
скільки кисню вступило в реакцію 15г алюмінію.Якщо утворилося Al2O3.
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Ответы

Автор ответа: ksusaleonenko5
1

Ответ:

Вроде это

Объяснение:

1) визначимо n(Al)

n(Al)=m/M

n(al)=5.4/27=0.2 моль

2) Визначимо кількість речовини оксиду алюмінію Al2O3, склавши реакцію

4 моль 2 моль

4Al+3O2=2Al2O3

0, 2моль x моль x=2*0.2/4=0.1 моль оксиду алюмінію

3)Визначимо масу оксиду алюмінію Al2O3 де М(Al2O3)=102г/моль

m(Al2O3)=n*M=0.1*102=10,2г

Відповідь: m(Al2O3)=10.2г

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