Amount of substances: The mole

Cards (25)

  • What is the quantity used to measure the amount of substance?
    The mole
  • How many particles are in one mole?
    6.02 × 10<sup>23</sup> particles
  • What is the Avogadro constant?
    It is the number of particles in a mole
  • How is the amount of substance measured?
    In moles
  • What does one mole of any substance contain?
    The same number of particles as carbon-12
  • What is the mass of 1 mole of an element equal to?
    Its relative atomic mass in grams
  • How much does 1 mole of magnesium weigh?
    24.3 g
  • How much does 2 moles of magnesium weigh?
    48.6 g
  • What is the formula for calculating the amount of substance?
    amount (mol) = mass (g) / molar mass (g mol<sup>-1</sup>)
  • How do you calculate the amount of moles in 10 g of calcium?
    amount = 10/40 = 0.25 mol
  • What is the molar mass of oxygen gas, O<sub>2</sub>?
    32 g mol<sup>-1</sup>
  • How many moles are in 16 g of oxygen gas?
    0.5 mole
  • What is the rearranged equation for molar mass?
    molar mass = mass / amount
  • How do you calculate the number of atoms in 13.5 g of Al?
    Calculate moles, then particles
  • What is the number of moles in 13.5 g of Al?
    0.5 mol
  • How do you calculate the number of particles from moles?
    number of particles = amount × Avogadro constant
  • What is the number of particles in 0.5 mol of Al?
    3.01 × 10<sup>23</sup> atoms
  • How can molar mass be calculated using moles?
    Using mass and number of moles
  • What is the molar mass of a substance if 0.114 g corresponds to 0.00200 mol?
    57.0 g mol<sup>-1</sup>
  • How do you calculate the molar mass of CaCO<sub>3</sub>?
    40.1 + 12.0 + (3 × 16.0)
  • What is the molar mass of CaCO<sub>3</sub>?
    100.1 g mol<sup>-1</sup>
  • How many moles are in 15.0 g of CaCO<sub>3</sub>?
    0.150 mol
  • What is the molar mass of a substance?
    The mass in grams of 1 mole of the substance
  • How is molar mass expressed?
    In g mol<sup>-1</sup>
  • What is the relationship between molar mass and relative atomic mass?
    They are the same expressed in g mol<sup>-1</sup>