How many particles are there in one mole of a substance?

Answer 1

6.022 x 1023 particles.

Answer 2

There are approximately 6.022 x 10^23 particles in one mole of a substance, which is known as Avogadro's number. These particles can be atoms, molecules, ions, or other types of particles depending on the substance.

Answer 3

There may be about 6.022 x 1023 atoms in one mole, but we must ask this question: a mole of what? While a mole of a substance contains about 6.022 x 1023 particles of that substance, the substance may not be composed of single atoms. As this is a critical issue for the budding chemist, let's investigate just a bit.

A mole of any substance contains Avagadro's number of "basic units" of that substance. Avagadro's number (or the Avagadro constant) is about 6.022 x 1023 "basic units" of a given substance. In the case of helium, we'll have that many atoms of helium. That's because if we encounter helium floating around in air, it is found in units of single atoms. In the case of hydrogen or oxygen, these gases exist as diatomic molecules. That means there are two atoms in a given molecule of each gas, and there will be 2 times 6.022 x 1023 atoms in a mole of hydrogen or oxygen.

Going further, we'll see about 6.022 x 1023 molecules of H2O in a mole of water. Using the logic above, we'll have about 6.022 x 1023 atoms of oxygen in a mole of water, and twice that many atoms of hydrogen in the mole of water.

It is critical to the understanding of the chemist to be clear about the mole and what it represents.

Answer 4

The number of particles in one mole is 6.022 x 1023.

Answer 5

There are 6.022 X 1023 particles in one mole of a substance.

Answer 6

The value of this Avogadro number is 6.0221429×10^23 per mol

Answer 7

The mole is defined as the amount of substance which contain's Avogadro's number of particles. Avogadro's number is

6.02214×1023

Answer 8

A mole is defined as Avogadro's Number of particles, that number being approximately 6.02 x 1023.

Answer 9

One mole of water contain 6,022 140 857(74) molecules; the number of atoms is triple.