The Mole

John D. Thompson

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Answer the questions below and then click "submit" to check your answers.

  1. The molecular mass of carbon dioxide is
  2. Your answer:
    44 u
    18 u
    40 u
    56 u


  3. 6.02 x 10^23 formula units of a compound has the same mass in grams as ___ formula units in atomic mass units.
  4. Your answer:
    1
    6.02
    10^-23
    10^23


  5. One mole of water contains
  6. Your answer:
    six molecules of water
    one mole of oxygen atoms
    one atom of oxygen
    two atoms of hydrogen


  7. A compound with the empirical formula CH has a molecular mass of 26u. What is the molecular formula?
  8. Your answer:
    C3H3
    C6H6
    C2H2
    CH


  9. What is the empirical formula for C6H12O6?
  10. Your answer:
    C6H12O6
    CHO
    CH2O
    CHO2


  11. Two moles of solute are dissolved in 0.25L of solution. What is the molarity?
  12. Your answer:
    2.0M
    4.0M
    0.5M
    8.0M


  13. How many moles of oxygen atoms are in one mole of calcium nitrite?
  14. Your answer:
    4
    2
    1
    3


  15. How many moles of carbon are in 2.4x10^24 atoms of carbon?
  16. Your answer:
    10^24
    4
    1
    2


  17. How many liters of 6M HCl would contain 3 moles of HCl?
  18. Your answer:
    2L
    1.8L
    18L
    0.5L


  19. For lithium, 6.941 represents the
  20. Your answer:
    mass of an atom in atomic mass units and grams in a mole
    atomic number
    number of atoms in a mole
    molarity of a saturated solution of lithium



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