Calculating the Amount of Substance

• You can calculate the amount of substance in a given mass of a substance using the formula:?

  amount (mol) = mass of substance (g) / atomic mass (or formula) (g/mol)
• Calculate the number of moles of carbon dioxide in 33g of the compound? (Hint - find the Mr of Carbon dioxide)

  0.75 mol
• Answer the question below (Hints - Find the number of moles of magnesium : it will be equal to the number of moles of magnesium chloride. The chlorine is unlimited so does not need considered)

  Mass of magnesium chloride = 285g

  
• Answer the question below?

  Mass of calcium sulfate = 272g

  
• Answer the question below?

  Mass of calcium carbonate = 400g

  
• Answer the question below

  Mass of magnesium chloride = 190g

  
• Answer the question below

  Mass of sodium sulfate = 426g

  
• Answer the question below

  Mass of hydrogen peroxide = 136g