Question

Выпишите формулы сложных веществ,определите валентность химических элементов ? Al2S3,H2,Cu,NO2,CF4,Fe2O3.Спасибо большое заранее!!!

Answer 1

Сложные вещества :
1)Al2S3(валентность Al=3,S=2)
2)NO2(валентность N=3(4),O=2)
3)CF4(валентность C=4,F=1)
4)Fe2O3(валентность Fe=3,O=2)

Answer 2

Chemical Formulas and Valency of Elements

Aluminum Sulfide (Al2S3): - The chemical formula for aluminum sulfide is Al2S3. - In this compound, aluminum has a valency of +3, and sulfur has a valency of -2. - The valency of aluminum is determined by the charge it typically forms when it becomes an ion, which is +3. - The valency of sulfur is determined by the charge it typically forms when it becomes an ion, which is -2. - Therefore, to balance the charges in the compound, two aluminum ions (each with a charge of +3) combine with three sulfur ions (each with a charge of -2) to form Al2S3.

Hydrogen (H2): - The chemical formula for hydrogen gas is H2. - Hydrogen is diatomic in its elemental form, meaning it exists as H2 molecules. - Each hydrogen atom has a valency of +1.

Copper (Cu): - The chemical symbol for copper is Cu. - Copper typically has a valency of +2, forming compounds like CuCl2 and CuSO4.

Nitrite Ion (NO2): - The chemical formula for the nitrite ion is NO2. - In this ion, nitrogen has a valency of +3, and each oxygen has a valency of -2. - The overall charge of the nitrite ion is -1, which is achieved by the combination of nitrogen's +3 valency and the two -2 valencies from the oxygen atoms.

Carbon Tetrafluoride (CF4): - The chemical formula for carbon tetrafluoride is CF4. - In this compound, carbon has a valency of +4, and each fluorine has a valency of -1. - The valency of carbon is determined by the charge it typically forms when it becomes an ion, which is +4. - The valency of fluorine is determined by the charge it typically forms when it becomes an ion, which is -1. - Therefore, to balance the charges in the compound, one carbon ion (with a charge of +4) combines with four fluorine ions (each with a charge of -1) to form CF4.

Iron (III) Oxide (Fe2O3): - The chemical formula for iron (III) oxide is Fe2O3. - In this compound, iron has a valency of +3, and oxygen has a valency of -2. - The valency of iron is determined by the charge it typically forms when it becomes an ion, which is +3. - The valency of oxygen is determined by the charge it typically forms when it becomes an ion, which is -2. - Therefore, to balance the charges in the compound, two iron ions (each with a charge of +3) combine with three oxygen ions (each with a charge of -2) to form Fe2O3.

I hope this information is helpful! If you have any more questions or need further clarification, feel free to ask.