Mole Concept

• What is a mole in chemistry?

  A unit to measure the amount of substance
• How many particles are in one mole?

  6.022 x 10^23 particles
• Why is the mole useful in chemistry?

  It relates substance amount to mass
• What is Avogadro's number?

  6.022 x 10^23
• What does Avogadro's number represent?

  Particles in one mole of a substance
• How many water molecules are in one mole of water?

  6.022 x 10^23 water molecules
• How do you calculate molar mass?

  Add atomic masses of all atoms in a molecule
• What is the molar mass of water (H₂O)?

  18.016 g/mol
• What is the process to convert between moles, mass, and number of particles?

  • Moles to Mass: Multiply moles by molar mass
  • Mass to Moles: Divide mass by molar mass
  • Moles to Particles: Multiply moles by Avogadro's number
  • Particles to Moles: Divide particles by Avogadro's number
• How do you convert 2 moles of water to mass?

  36.032 g
• How do you convert 54.048 g of water to moles?

  3 moles
• How many particles are in 1 mole of a substance?

  6.022 x 10^23 particles
• How many moles are in 1.2044 x 10^24 particles?

  2 moles
• How can you visualize moles in everyday terms?

  • Moles are like bags of candy
  • From bags to weight: Moles to mass using molar mass
  • From weight to bags: Mass to moles
  • From bags to candies: Moles to particles using Avogadro's number
  • From candies to bags: Particles to moles by dividing by Avogadro's number