#moleconcept #chemistery #molevsparticles

Pg:- 106,107

Mole

• Definition: A mole is a unit of measurement in chemistry used to express amounts of a chemical substance. It is one of the seven base units in the International System of Units (SI).

• Value: One mole of any substance contains exactly 6.022 * 10^23 entities (Avogadro's number), whether they are atoms, molecules, ions, or other particles.

• Usage: The concept of the mole allows chemists to count and compare the number of particles in a given sample. For example, one mole of carbon-12 atoms has a mass of 12 grams and contains 6.022 * 10^23 carbon atoms.

Particles

• Definition: The term "particles" is more general and can refer to atoms, molecules, ions, electrons, or any small entities in physics and chemistry.

• Nature: Particles are the building blocks of matter. Depending on the context, "particles" could refer to different things. For example, in a gas, particles are typically atoms or molecules, while in a solution, particles could be ions.

• Scale: The number of particles can be counted or described in different units, such as a mole (which contains Avogadro's number of particles), or individually (e.g., a certain number of atoms).

Relationship Between Mole and Particles

• Connection: The mole provides a bridge between the macroscopic scale, where substances are measured in grams or liters, and the microscopic scale, where the substance is composed of individual particles.

• Conversion: To determine the number of particles in a sample, you can use the relationship: Number of particles = No of moles * 6.022 10^23

• No of moles = no of particles/ 6.022 * 10^23