How many particles are in 1 mol of a substance?

What value gives the number of particles in 1 mol of a substance?

A. 6.02 mc012-1.jpg 10^21

B. 6.02 mc012-2.jpg 10^22

C. 6.02 mc012-3.jpg 10^23

D. 6.02 mc012-4.jpg 10^24

Answer:

6.02 x 10^23

The value that gives the number of particles in 1 mol of a substance is 6.02 x 10^23. This value is known as Avogadro's number, which represents the number of constituent particles (usually atoms or molecules) that are contained in one mole of a substance.

In other words, if you have one mole of any substance, you will have 6.02 x 10^23 particles of that substance. This value plays a crucial role in chemistry and is used to convert between the mass of a substance and the number of particles it contains.

Understanding Avogadro's number is fundamental in chemistry as it allows scientists to relate macroscopic quantities of substances to their microscopic counterparts. It is a key concept in stoichiometry, the branch of chemistry that deals with the quantitative relationships between reactants and products in chemical reactions.