ЧЕНЬ НУЖНО ОЧЕНЬ ВАС Запишите «формула – класс соединений» Укажите по плану:

Относительная атомная масса для каждого элемента +

Расчёт относительной молекулярной массы + Расчёт массовой доли каждого элемента в веществе (максимально подробно, в %)

Ba(OH)2 N2O5 HI Li2CO3

Укажите по плану:

Относительная атомная масса для каждого элемента +

Расчёт относительной молекулярной массы + Расчёт массовой доли каждого элемента в веществе (максимально подробно, в %)

Mn(OH)2

(на всякий случай прикреплю фотку)​

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Элемент, в атоме которого три электронных слоя (3-й период), а на внешнем уровне находятся семь электронов (VII группа):

- хлор (Cl2), его высший оксид - оксид хлора (Vll) (Cl2O7) - это кислотный оксид, который будет взаимодействовать с основными оксидами, основаниями и водой.

Cl2O7 + H2O = 2HClO4

Cl2O7 + Sr(OH)2 = Sr(ClO4)2 + H2O

Cl2O7 + BaSO4 ≠ реакция с нерастворимыми солями нехарактерна

Cl2O7 + Br2O3 ≠ реакция с кислотными оксидами не характерна

Cl2O7 + CaO = Ca(ClO4)2

ответ: H2O, Sr(OH)2, CaO

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