Question

Определите валентность элементов по формулам : HgO K2S B2O3 ZnO MnO2 NiO Cu2O SnO2 Ni2O3 SO3 As2O5 Cl2O7 Очень срочно !!!!!!!

Answer 1

ІІ    ІІ  І  ІІ  ІІІ   ІІ    ІІ  ІІ  ІV  ІІ   ІІ  ІІ  І    ІІHgO K2S B2O3 ZnO MnO2 NiO Cu2O  ІV  ІІ    ІІІ  ІІ   VІ  ІІ   V   ІІ   VІІ    ІІ SnO2 Ni2O3 SO3 As2O5 Cl2O7

Answer 2

Valence of Elements in the Given Formulas

To determine the valence of elements in the given formulas, we need to consider the charges of the ions involved. Here are the valences of the elements in the given formulas:

1. HgO (Mercury(II) oxide): - Mercury (Hg) has a valence of +2. - Oxygen (O) has a valence of -2. - Therefore, the valence of Hg in HgO is +2, and the valence of O is -2.

2. K2S (Potassium sulfide): - Potassium (K) has a valence of +1. - Sulfur (S) has a valence of -2. - Therefore, the valence of K in K2S is +1, and the valence of S is -2.

3. B2O3 (Boron trioxide): - Boron (B) has a valence of +3. - Oxygen (O) has a valence of -2. - Therefore, the valence of B in B2O3 is +3, and the valence of O is -2.

4. ZnO (Zinc oxide): - Zinc (Zn) has a valence of +2. - Oxygen (O) has a valence of -2. - Therefore, the valence of Zn in ZnO is +2, and the valence of O is -2.

5. MnO2 (Manganese(IV) oxide): - Manganese (Mn) has a valence of +4. - Oxygen (O) has a valence of -2. - Therefore, the valence of Mn in MnO2 is +4, and the valence of O is -2.

6. NiO (Nickel(II) oxide): - Nickel (Ni) has a valence of +2. - Oxygen (O) has a valence of -2. - Therefore, the valence of Ni in NiO is +2, and the valence of O is -2.

7. Cu2O (Copper(I) oxide): - Copper (Cu) has a valence of +1. - Oxygen (O) has a valence of -2. - Therefore, the valence of Cu in Cu2O is +1, and the valence of O is -2.

8. SnO2 (Tin(IV) oxide): - Tin (Sn) has a valence of +4. - Oxygen (O) has a valence of -2. - Therefore, the valence of Sn in SnO2 is +4, and the valence of O is -2.

9. Ni2O3 (Nickel(III) oxide): - Nickel (Ni) has a valence of +3. - Oxygen (O) has a valence of -2. - Therefore, the valence of Ni in Ni2O3 is +3, and the valence of O is -2.

10. SO3 (Sulfur trioxide): - Sulfur (S) has a valence of +6. - Oxygen (O) has a valence of -2. - Therefore, the valence of S in SO3 is +6, and the valence of O is -2.

11. As2O5 (Arsenic(V) oxide): - Arsenic (As) has a valence of +5. - Oxygen (O) has a valence of -2. - Therefore, the valence of As in As2O5 is +5, and the valence of O is -2.

12. Cl2O7 (Dichlorine heptoxide): - Chlorine (Cl) has a valence of +7. - Oxygen (O) has a valence of -2. - Therefore, the valence of Cl in Cl2O7 is +7, and the valence of O is -2.

I hope this helps! Let me know if you have any further questions.