Stoichiometry: Counting Particles & Avogadro's Number Quiz

Counting units are used for certain kinds of objects depending on their size. For example, eggs are counted in twelves, called dozens, and shoes are counted in pairs. Paper is counted in reams and pencils are counted in the gross. Chemists also need a unit for counting very small particles like molecules, formula units and atoms. This unit is called the mole. A mole is the SI base unit for measuring the amount of a substance. One mole is 6.02 * 10^23 particles. This number is called Avogadro's number, after Amedeo Avogadro. This quiz will cover the basics of counting small particles.You will need a calculator. Read the questions carefully and select the best answer from the choices.