Determining Oxidation Numbers for Elements within Compounds, pp232-235
1. CF4
C _____
F _____
2. SO2
S _____
O _____
3. HNO3
H _____
N _____
4. P4O10
P _____
O _____
5. H2O2
H _____
O _____
6. HClO4
H _____
Cl _____
O _____
7. HClO2
H _____
Cl _____
O _____
8. HClO
H _____
Cl _____
O _____
9. N2O5
N _____
O _____
10. Na2O2
Na _____
O _____
11. LiNO2
Li _____
N _____
O _____
12. Ca(NO3)2 Ca _____
N _____
O _____
13. H2SO4
S _____
O _____
14. NaHCO3 Na _____
H _____
C _____
15. PO4 3-
O _____
H _____
P _____
O _____
O _____
Calculating Molar Masses of Compounds, pp 237-239
16. CF4 _______________________________________________________
17. LiNO3 _______________________________________________________
18. NaOH _______________________________________________________
19. H2O _______________________________________________________
20. AlCl3 _______________________________________________________
21. KMnO4 _______________________________________________________
22. Ba(NO3)2 _______________________________________________________
Molar Mass as a Conversion Factor, pp 240-242
( # moles)(molar mass in grams/ mol) = mass in grams
6.022 x 1023 particles/ mole = Avogadro’s number
23. ? grams of 2.5 mol O2 _______________________________________________________
24. Ibuprofen, C13H18O2, has molar mass of 206.31 g/mol.
a. ? # mol in 33 grams _______________________________________________________
b. ? # molecules in 33 g _______________________________________________________
c. ? # grams of C in 33 g _______________________________________________________
25. ? mol in 6.60 g (NH4)2SO4 _______________________________________________________
26. ? mol in 4.5 kg Ca(OH)2 _______________________________________________________
27. ? # molecules in 25.0 g H2SO4 _______________________________________________________
28. ? # grams in 6.25 mol Cu(NO3)2 ______________________________________________________
29. ? # mol in 1.2 x 1024 atoms of Na______________________________________________________
30. ? # grams in 2.5 mol NaOH
_______________________________________________________
Percentage Composition, pp 242 – 244