Предмет: Химия, автор: Ирина223

Помогите пожалуйста решить задачу по химии.8 класс Вычислите массу натрия,необходимого для получения 10,7 г хлорида натрия в избытке хлора.Схема реакции: 2Na+Cl2=2NaCl

Ответы

Автор ответа: kupon23

2Na+Cl2=2NaCl

Mr(Na)=23(m=23*2=46, так как 2 моль в реакции)

Mr(NaCl)=58,5(m=58,5*2=117, так как 2 моль)
Пишем пропорцию

x/46=10,7/117

x=4,206 грамм

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