In chemistry, a chemical formula is a shorthand way of describing a chemical compound, or a molecule with the help of symbols and valency of elements. It is one of the fundamental aspects of chemistry. In other words, a chemical…
In chemistry, percentage composition is the mass percentage of each component element present in any compound. The percentage composition (or mass percentage) of each element is equal to the mass of that element divided by the total mass present in…
We commonly use a unit dozen or unit gross for counting of materials or goods. For example, one dozen pens means 12 pens or one dozen bananas means 12 bananas. Similarly, one gross books means 144 books or one gross…
In chemistry, molecular mass is an important property of molecules that are concerned with their physical and chemical properties. It is a measure of the total mass of all the atoms in a molecule. Understanding molecular mass is an important…
As we know that atoms of all elements are extremely small. We cannot see them either by the naked eye or even by the powerful microscope. Absolute (or actual) masses of atoms of elements are very, very small. Therefore, it…
Molecules are essential building blocks of everything around us. They are tiny particles that comprise atoms bonded together in a specific way. Molecules are the foundation of all living things and non-living things. Understanding what a molecule is and how…
In accordance with Dalton’s atomic theory, atoms of distinct elements react with each other in the simple ratios. Gay-Lussac proposed that gases react with each other in the simple ratio of their volumes, provided all gases are at the same…
In 1808, An English scientist John Dalton proposed the first scientific theory of matter. This theory is also known as Dalton’s atomic theory of matter. This atomic theory is mainly based on the laws of chemical combination. Postulates of Dalton’s…
The laws which deal with the composition of substances or compounds by mass or by volume are called laws of chemical combination or laws of stoichiometry. These laws are experimental laws which have been prepared by scientists based on performing…
Physical and chemical changes are very important in our lives. Every day we see many changes in our surroundings. These changes may occur one or more substances. For example, you are making a sugar solution by dissolving some sugar in…