1. Ch 9 Review the basics. This is just a review of simpler concepts or old material that you should know to be successful with stoichiometry

2. #1 O 1 mole of NaCl would equal 6.022 x 10 23 atoms. (F…NaCl is compoud) True or False

3. #2 O There are 22.4 Liters of gas in 1 mole of ANY gas at STP. O (T) True or False

4. #3 O In order to find the molar mass of a compound, you need to use the periodic table to look up ATOMIC NUMBERS. O (F…need atomic masses) True or False

5. #4 O 1 mole of carbon is equal to 12.011 grams. O (T) True or False

6. #5 O Avogadro’s number is equal to 22.4 L. O (F it is 6.022 * 10 23 ) True or False

7. #6 O 1 mole of molecules is equal to Avogadro’s number of molecules O (T) True or False

8. #7 O The mole is a handy conversion factor because it can be equal to so many different things. O (T) True or False

9. #8 O It would be impossible to hold 1 mole of any substance in the palm of your hand. O (F you can hold a mole of H atoms) True or False

10. #9 O The molar mass of Oxygen gas is 16.00 grams O (F…Oxygen gas is diatomic so 32.00 g) True or False

11. #10 O How many sig figs in 12.00?. O (4 sig figs)

12. #11 O How many sig figs in the number 6.022 x 10 23 O (4 sig figs)

13. #12 O The formula for Iron (II) Nitride is... O (Fe 3 N 2 )

14. #13 O The charge on a beryllium ion would be…. O (+2)

15. #14 O Write he formula for dinitrogen trioxide. O (N 2 O 3 )

16. #15 O Disulfur Trioxide is a covalent compound O (T) True or False

17. #16 O NaCl is an ionic compound O (T) True or False

18. #17 O In order to calculate from mass to moles, you must use Avogadro’s number O (F, you need molar mass) True or False

19. #18 O In order to calculate from moles to liters, you must use the molar mass of the gas. O (F, you need the conversion 22.4L/1mol) True or False

20. #19 O In order to calculate from atoms to moles, you will need to use 6.02 x 10 23. O (T) True or False

21. #20 O How many atoms 1 formula unit of NaOH. O (3)

22. #21 O How many Cl atoms in 1 mole of Carbon Tetrachloride, CCl 4 ? Just show work. O ( 6.022x10 23 x 4)

23. #22 O 1 mole of iron atoms is enough for a large building. O (F, it is about the size of ping pong ball) True or False

24. #23 O 1 mole of xenon gas will take up much more space than 1 mole of He gas. O (F, 1 mole of all gas = 22.4 L ) True or False

25. #24 O It is impossible to calculate the molar mass of a substance if you do not know its formula. O (T) True or False

26. #25 O The limiting reactant will be the reactant that produces the most product. O (F) True or False

27. #26 O To calculate percent yield, you must be given the actual yield and have to use the balanced equation to calculate the theoretical yield O (T) True or False

28. #27 O Actual yield is 3.00g and theoretical yield is 4.00g. What is the %yield? O (75%)

30. # O The number 0.0034 has 2 sig figs O (T) True or False

31. # O If you multiply 25.3 by 2.9 your final answer will have 3 sig figs O (F, it has to match the sig figs of the least so it would have 2 sig figs) True or False