Physical Chemistry
Law of Conservation of Mass or Matter with Example
According to the law of conservation of mass (or the law of conservation of matter), matter is neither created nor destroyed in a chemical reaction or change. It means the total mass of products is equal to the total mass…
Properties of Matter | Physical and Chemical
Properties of matter (or material substances) are simply characteristics by which different kinds of matter may be commonly recognized or identified. These characteristics help us differentiate or identify one substance from another. For example, a property of water is a…
What is Matter: Definition, Classification
Definition of Matter: Anything that has mass and occupies space (i.e. volume) is called matter. It is the things our universe is composed of and all objects in the universe follow to this definition. All the surrounding objects in the…
What is Chemistry: Definition, Branch, History
Chemistry is a branch or part of physical science which deals with the study of properties of matter. By matter, we mean substances we can see, feel, touch, taste, and smell. Chemistry is concerned with the physical and chemical properties…
What is Molecular Mass: Definition, Example
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…
What is Atomic Mass of Element: Atomic Mass Unit
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…
What is Molecule: Types, Examples
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…
Avogadro’s Hypothesis: Applications, Example
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…
John Dalton’s Atomic Theory: Postulates, Drawbacks
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. The main postulates…
Laws of Chemical Combination with Examples
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…
