Question

Составить формулы, если известно, из каких химических элементов состоит вещество и их валентность.Дать названия веществам: CuH; BO; BaCL; KO.

Answer 1

CuH2 гидрид меди
B2O3  оксид бора
BaCl2   хлорид бария
K2O   оксид калия

Answer 2

Chemical Formulas and Names of Substances

When it comes to determining the chemical formulas and names of substances based on the elements they consist of and their valencies, we can use the following guidelines:

1. Copper Hydride (CuH): - Copper (Cu) has a valency of +2. - Hydrogen (H) has a valency of -1. - To balance the charges, we need two hydrogen atoms for every copper atom. - Therefore, the chemical formula for copper hydride is CuH2.

2. Boron Oxide (BO): - Boron (B) has a valency of +3. - Oxygen (O) has a valency of -2. - To balance the charges, we need two oxygen atoms for every boron atom. - Therefore, the chemical formula for boron oxide is B2O3.

3. Barium Chloride (BaCl): - Barium (Ba) has a valency of +2. - Chlorine (Cl) has a valency of -1. - To balance the charges, we need two chlorine atoms for every barium atom. - Therefore, the chemical formula for barium chloride is BaCl2.

4. Potassium Oxide (KO): - Potassium (K) has a valency of +1. - Oxygen (O) has a valency of -2. - To balance the charges, we need two potassium atoms for every oxygen atom. - Therefore, the chemical formula for potassium oxide is K2O.

Please note that these formulas and names are based on the valencies of the elements and the need to balance charges. It's important to consider the specific context and chemical reactions when dealing with more complex compounds.