What is the definition of Avogadro's constant and when should I use it?
Avogadro's constant is defined as the number of atoms/molecules in one mole of a substance. It's value is approximately 6.023 x 10^23.
It is often used in conjunction with the equation "moles = mass (in grams)/relative molecular mass" and "number of atoms/particles = Avogadro's constant x moles" to determine the number of atoms in a mass of a substance or element.
You should use it for determining this, as well as remembering the definition as it is useful for understanding what a 'mole' is - one mole of a substance is 6.023 x 10^23 atoms or molecules of that substance.
BK
Related Chemistry A Level answers
All answers ▸Why is SiO2 a solid whereas CO2 is a gas at room temeperature?
How do you calculate the equilibrium constant, Kc, of a reaction?
What is the order of decreasing acidity for the molecules phenol, ethanoic acid and ethanol? Why?
How do I calculate the Gibbs free energy change for a reaction when given the entropy change, enthalpy change and the reaction conditions>