Question

What are examples of compounds and their formulas?

Answer 1

Hint : We know that the compound is a pure substance that is formed by the chemical combination of two or more elements in a fixed proportion by mass. Compound formation always takes place as a result of a chemical reaction. Also, the compound does not exhibit the properties of its constituent elements.

Complete Step By Step Answer:
As we know, the chemical formula of a compound is a symbolic representation of its chemical composition. Moreover, the chemical formula provides an insight into the elements that constitute the molecules of a compound and also the ratio in which the atoms of these elements combine. Compounds are pure substances whereas mixtures are impure. A compound always has a fixed chemical composition by mass, which means that the elements that combine together to form a compound always do so in a fixed ratio. This is why compounds have a molecular formula. Compounds have fixed melting and boiling points.
A chemical formula is defined as a collection of chemical symbols that is used to show the elements present in any compound and its proportion. The matter around us can be categorized into pure matter and impure matter. Pure substances are the ones that have a fixed chemical composition. Impure substances are the ones that can have varying compositions, and as such do not exhibit a fixed set of properties.

Compound Name	Molecular Formula
Water	${{H}_{2}}O$
Hydrochloric Acid	$HCl$
Sodium Chloride	$NaCl$
Ammonia	$N{{H}_{3}}$
Magnesium Chloride	$MgC{{l}_{2}}$

Note :
Remember that the one molecule of a compound is represented by its chemical formula. The formula of a compound is the statement of the composition of that particular compound in which the symbols represent the elements that are present in it while the subscripts show the number of atoms of each element. A molecule is stable and has an independent existence.