Question

B. Name the following: 1. the elements present in hydrochloric acid 2. atoms present in one molecule of water 3. the symbol of lead element 4. gas obtained when calcium carbonate in heated 5. any material with a specific chemical composition 6. the smallest unit of any chemical element 7. reaction in which heat is absorbed 8. the simplest unit of a chemical compound 9. the process of forming crystal of a solid substance from its solution​

Answer 1

Answer:

1)Hydrogen chloride (HCl), a compound of the elements hydrogen and chlorine, a gas at room temperature and pressure. A solution of the gas in water is called hydrochloric acid.

2)THREE ATOMS

A water molecule consists of three atoms; an oxygen atom and two hydrogen atoms, which are bond together like little magnets.

3)Pb

4)carbon dioxide gas

5)A chemical substance may well be defined as "any material with a definite chemical composition" in an introductory general chemistry textbook. According to this definition a chemical substance can either be a pure chemical element or a pure chemical compound.

6)Atoms

7)Endothermic reactions

8)Molecules

9)Crystallization or crystallisation is the process by which a solid forms, where the atoms or molecules are highly organized into a structure known as a crystal. Some of the ways by which crystals form are precipitating from a solution, freezing, or more rarely deposition directly from a gas.

Explanation:

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