Analía Bellizzi – Chemistry Classes

Ronald Reagan High School

The Mole exercises #1

MOLE EXERCISES #1 – (answers between parenthesis)

  1. Calculate the mass of 2 moles of Sodium atoms. (46g)
  2. calculate the mass of 3 moles of potassium atoms (117g)
  3. calculate hos many moles of phosphorous are in 310 g of the element. (10 mol)
  4. How many grams of aluminum are in 30 moles of the metal? (810g)
  5. How many kilograms are present in the mass calculated in #4? (0.810kg)
  6. which is the mass of 1 mole of chlorine gas? (71g)
  7. which is the mass of 0.2 moles of water? (3.6g)
  8. how many moles of sulfuric acid are present in 4.9 g of the substance? (0.05moles)
  9. If you calculate that 3 moles of an element x has a mass of 69g, how many grams are contained in one mole of the element? (23g)
  10. 0.5 moles of a metal has a mass of 20 g. which is the molar mass of the element? (40g) the element is calcium