Home > Chemistry > Everything is Made of Atoms

How do chemists count atoms and molecules?

Answer 1

Not one by one, or even two by two.........

Chemists use the property of mass equivalence, and have introduced the concept of #"moles"#. If we have a mole of substance we have #6.022xx10^23# individual particles of that substance.

For a given atom, we know the mass of #6.022xx10^23# individual atoms, and this mass is given on the Periodic Table, which should always be made available in every exam. It is up to you to learn how to use it.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Olivia Anton

Chemists use the mole concept to count atoms and molecules. The mole is a unit representing Avogadro's number of entities, which is approximately 6.022 x 10^23. This allows chemists to quantify substances based on the number of atoms or molecules.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.