Understanding Moles and Avogadro's Number

What is Avogadro’s Number?

What is the unit for molar mass?

• L/mol

• g/mol

• atm

• mol/L

Which of the following is a representative particle?

• Atom

• Electron

• Neutron

• Proton

What is the volume occupied by one mole of a gas at STP?

• 1.0 L

• 22.4 L

• 100 L

• 0.1 L

Which term describes the sum of all atomic masses in a compound as represented in a chemical formula?

• Molar mass

• Formula mass

• Percentage composition

• Molar volume

At what temperature and pressure is STP defined?

What does percentage composition represent?

• The number of atoms in a molecule

• The mass of each element in a compound relative to the total mass of the compound

• The number of moles in a sample

• The volume of a gas at STP

Which of the following best defines a mole?

• The smallest unit of a substance

• The sum of atomic masses in a compound

• The volume of a gas at STP

If you have 1 mole of water molecules, how many molecules do you have?

• 16 g/mol

• 18 g/mol

• 20 g/mol

• 2 g/mol