Question

Определи валентность: N2O5 , CI2O7 , CaO , A1CI3 , HF , MgO , SO2​

Answer 1

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Answer 2

Valence of N2O5

The valence of a compound refers to the combining power of an element, which determines the number of electrons an atom can gain, lose, or share in order to form chemical bonds.

N2O5 is a compound composed of nitrogen (N) and oxygen (O). To determine the valence of N2O5, we need to consider the oxidation states of each element.

In N2O5, nitrogen has an oxidation state of +5, while oxygen has an oxidation state of -2. The compound is neutral overall, so the sum of the oxidation states must be zero.

Since there are two nitrogen atoms in N2O5, the total oxidation state of nitrogen is +10. To balance this, each oxygen atom must have an oxidation state of -2.

Therefore, the valence of N2O5 is +10/-2.

Valence of Cl2O7

Cl2O7 is a compound composed of chlorine (Cl) and oxygen (O). To determine the valence of Cl2O7, we need to consider the oxidation states of each element.

In Cl2O7, chlorine has an oxidation state of +7, while oxygen has an oxidation state of -2. The compound is neutral overall, so the sum of the oxidation states must be zero.

Since there are two chlorine atoms in Cl2O7, the total oxidation state of chlorine is +14. To balance this, each oxygen atom must have an oxidation state of -2.

Therefore, the valence of Cl2O7 is +14/-2.

Valence of CaO

CaO is a compound composed of calcium (Ca) and oxygen (O). To determine the valence of CaO, we need to consider the oxidation states of each element.

In CaO, calcium has an oxidation state of +2, while oxygen has an oxidation state of -2. The compound is neutral overall, so the sum of the oxidation states must be zero.

Therefore, the valence of CaO is +2/-2.

Valence of AlCl3

AlCl3 is a compound composed of aluminum (Al) and chlorine (Cl). To determine the valence of AlCl3, we need to consider the oxidation states of each element.

In AlCl3, aluminum has an oxidation state of +3, while chlorine has an oxidation state of -1. The compound is neutral overall, so the sum of the oxidation states must be zero.

Since there are three chlorine atoms in AlCl3, the total oxidation state of chlorine is -3. To balance this, the oxidation state of aluminum must be +3.

Therefore, the valence of AlCl3 is +3/-1.

Valence of HF

HF is a compound composed of hydrogen (H) and fluorine (F). To determine the valence of HF, we need to consider the oxidation states of each element.

In HF, hydrogen has an oxidation state of +1, while fluorine has an oxidation state of -1. The compound is neutral overall, so the sum of the oxidation states must be zero.

Therefore, the valence of HF is +1/-1.

Valence of MgO

MgO is a compound composed of magnesium (Mg) and oxygen (O). To determine the valence of MgO, we need to consider the oxidation states of each element.

In MgO, magnesium has an oxidation state of +2, while oxygen has an oxidation state of -2. The compound is neutral overall, so the sum of the oxidation states must be zero.

Therefore, the valence of MgO is +2/-2.

Valence of SO2

SO2 is a compound composed of sulfur (S) and oxygen (O). To determine the valence of SO2, we need to consider the oxidation states of each element.

In SO2, sulfur