Предмет: Химия, автор: thomeh

ПОМОГИТЕ СРОЧНО ПОЖАЛУЙСТА!!!


1) задание по фото

2) Вкажіть елемент, що проявляє відновні властивості у реакції між залізом і розчином сульфатної кислоти.

а) гідроген
б)сульфур
в) ферум
г) оксиген

3)На 135г розчину купрум(ІІ) хлориду подіяли надлишком калій гідроксиду й одержали 9,8 г осаду. визначте,якою була масова частка купрум (ІІ) хлориду в розчині.

а)15%
б) 5%
в) 20%
г)10%

СРОЧНО!!!​

Приложения:

Ответы

Автор ответа: panasukkarina1
1

Ответ:

1 б

Объяснение: 2 в

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