Предмет: Химия, автор: yevazya

завдання на фото,допоможіть будь ласка

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Автор ответа: minecrafismytlife

1

Відповідь:

16. A)Na₄

Б)O₅

B)Na₂SO₄

17.P₂O₅ - P - V валентність, O - II валентність.

H₂S - H - I валентність, S - II валентність;

P₄, S

Пояснення:

Поясняти тут немає сенсу. Це дуже легко

Автор ответа: dobriakua

1

16.

А. 4Na;

Б. 5O₂;

В. Na₂SO₄.

17.

P₂O₅ - P(V), O(II);

H₂S - H(I), S(II);

P₂S₅.

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