Question

Составить формулу вещества по валентности HO , BeO , BO , СO IV , NO V , SO VI , SeO lll, TeO vI

Answer 1

Н2О
ВеО
В2О3
СО2
N2O5
S03
Se2O3
TeO3

вот к примеру у тебя есть SeO(3)
Это значит валентность у Se=3,так как валентность у кислорода всегда 2,т.е O2
Теперь нужно найти общее число,чтоб делилось и на 3 и на 2, это число 6.
дальше делим это число на валентность каждого элемента и вот ответ.
Se2O3

Answer 2

Formulas of Substances Based on Valency

To determine the formulas of substances based on their valency, we need to consider the valency of each element involved. Valency refers to the combining capacity of an element, which determines the number of bonds it can form with other elements.

Here are the formulas of the substances you mentioned, based on their valency:

1. HO (Hydroxide ion): - The valency of hydrogen (H) is +1, and the valency of oxygen (O) is -2. - To balance the charges, we need one hydrogen atom (+1) and one oxygen atom (-2). - Therefore, the formula for the hydroxide ion is OH-.

2. BeO (Beryllium oxide): - The valency of beryllium (Be) is +2, and the valency of oxygen (O) is -2. - To balance the charges, we need one beryllium atom (+2) and one oxygen atom (-2). - Therefore, the formula for beryllium oxide is BeO.

3. BO (Boron oxide): - The valency of boron (B) is +3, and the valency of oxygen (O) is -2. - To balance the charges, we need two boron atoms (+3 each) and three oxygen atoms (-2 each). - Therefore, the formula for boron oxide is B2O3.

4. CO IV (Carbon tetravalent): - The valency of carbon (C) is +4. - Therefore, the formula for carbon tetravalent is C.

5. NO V (Nitrogen pentavalent): - The valency of nitrogen (N) is +5. - Therefore, the formula for nitrogen pentavalent is N.

6. SO VI (Sulfur hexavalent): - The valency of sulfur (S) is +6. - Therefore, the formula for sulfur hexavalent is S.

7. SeO III (Selenium trioxide): - The valency of selenium (Se) is +4, and the valency of oxygen (O) is -2. - To balance the charges, we need one selenium atom (+4) and three oxygen atoms (-2 each). - Therefore, the formula for selenium trioxide is SeO3.

8. TeO VI (Tellurium hexavalent): - The valency of tellurium (Te) is +6, and the valency of oxygen (O) is -2. - To balance the charges, we need one tellurium atom (+6) and one oxygen atom (-2). - Therefore, the formula for tellurium hexavalent is TeO6.

Please note that the valency of elements can vary depending on the specific compound or context. The formulas provided above are based on the given valencies for each element.