Mole Concept

The mole concept is a fundamental principle in chemistry that relates the amount of substance to the number of particles (atoms, molecules, ions) it contains. One mole is defined as containing exactly $$6.02 \times 10^{23}$$ entities.

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in a molecule.

To convert grams to moles, use the formula: Moles = Mass (g) / Molar Mass (g/mol).

Avogadro's number is $$6.02 \times 10^{23}$$ , which is the number of particles in one mole of a substance.

1 mole of any substance contains $$6.02 \times 10^{23}$$ molecules of that substance.

To find the number of molecules from moles, use the formula: Number of molecules = Moles × Avogadro's number.

The first step is to identify the given information and determine what you need to find.

The conversion factor is the molar mass of the substance, expressed in grams per mole (g/mol).

The conversion factor is Avogadro's number, $$6.02 \times 10^{23}$$ molecules per mole.

You have $$2 \times 6.02 \times 10^{23} = 1.204 \times 10^{24}$$ molecules.