Mole, Empirical Formula and % Composition Worksheet

Mole Concept Review

Indicate which type of representative particle each of the following would be made up of:

Atoms molecules (MC) formula units (FU)

1. aluminum chloride ______2. iron ______3. nitrogen gas ______

4. sulfur trioxide ______5. copper(II) nitride ______6. gold ______

7. hydrogen gas ______8. sodium phosphate ______9. iodine ______

Solve each of the following problems. SHOW ALL WORK!

10. Find the molar mass of potassium hydroxide.

11. Find the molar mass of sulfur dioxide.

12. Find the molar mass of magnesium nitrate.

13. How many atoms are in 0.00600-mol of Zinc (3.612 x 1021)?

14. How many moles are in 9.1 x 1014 molecules of fluorine gas (1.5 x 10-9)?

15. Convert 33.7 grams of Iron (III) Oxide to moles. (0.211 moles)

16. How many moles are there in 16.5 grams of Potassium Cyanide (KCN)? (0.253 moles)

17. How much would 6.7x1028 molecules of Manganese (II) Chloride weigh in grams? (1.4x107 grams)

18. How many atoms are there in 100 grams of zinc? (9.20 x1023 atoms)

19. Jennifer weighs 115 lbs. What is her mass in kilograms?

20. An IRL race at Texas Motor Speedway lasted 7843 seconds. How long was the race in hours?

21. The average speed of an IRL car is 89.5 meter per second. How fast is this speed in miles per hour?

22. The book shelves in the library are 2.00 yards long. How many centimeters are in 2.00 yards?