Understanding the Mole in Chemistry

What is the primary reason for using moles in chemistry?

• To calculate the temperature of a reaction

• To determine the color of a substance

• To express the amount of a substance in relation to the number of atoms

• To measure the volume of substances

Who is credited with defining the number of particles in a mole?

• Dmitri Mendeleev

• Albert Einstein

• Marie Curie

• Amedeo Avogadro

What does Avogadro's number allow chemists to do?

• Measure the temperature of a reaction

• Compare the same number of atoms or molecules regardless of their size

• Determine the color of a compound

• Calculate the speed of a chemical reaction

In a chemical reaction, what is always conserved?

• Temperature

• Mass

• Moles

• Volume

How can Avogadro's number be used in stoichiometry?

• To measure the temperature change in a reaction

• To determine the color of a solution

• To convert from grams to liters

• To convert from atoms or molecules to moles