Download Chemistry Review Sheet for Chapter 7

Chemistry Review Sheet for Chapter 7
Answer the following questions:
1. What is the oxidation number of H in MgH2?
2. What is the oxidation number of Cu in CuSO4?
3. What is the Greek prefix for the number 7?
4. What is the oxidation number of the alkaline earth metals?
5. What is the oxidation number of S in SCl2?
6. What is the Greek prefix for the number 9?
7. What is the oxidation number of P in Ca3P2?
8. What is the oxidation number of Hg in Hg3(PO4)2?
9. How many atoms are in 3.00kg of copper?
10. What is the gram-formula mass of NaCl?
11. What is the gram-formula mass of (NH4)2SO4?
12. What is the gram-formula mass of Pb(SO4)2?
13. What is the empirical formula of the antibiotic penicillin F, which is 53.82%C,
6.45%H, 8.97% N, 10.26% S, and 20.49% O?
14. Which type of formula shows the atoms involved and the exact composition?
The following are T/F questions:
15. The Greek prefix system may be used for either ionic or covalent compounds.
16. The number of helium atoms in a mole of helium is equal to the number of lead
atoms in a mole of lead.
17. A mole of sucrose (C12H22O11) has the same mass as a mole of water molecules.
18. A molecular compound may have identical empirical and molecular formulas.
19. A more electronegative element receives a negative oxidation number and a less
electronegative element receives a positive oxidation number.
20. Alkali metals always have a +1 oxidation number when they are not free
elements.
21. The oxidation number of the peroxide ion (O2 2-) is -2.
22. The sum of the oxidation numbers of all the atoms in a compound must equal
zero.
23. Nonmetals often have more than one oxidation state
24. Percent composition deals with the numbers of atoms in substances
Know which compounds match the following statements:
25. Covalently bonded groups of atoms that carry charges
26. A compound that contains water molecules in its crystalline structure
27. Contains hydrogen, oxygen, and another nonmetal
28. An ionic, two-element compound
29. The first element of this two-element compound is hydrogen
30. An anion composed of oxygen and one other element
Name the following compounds:
31. SO3
32. P2O5
33. Pb(NO3)2
34. KClO3
35. H2SO4 (acid name)
36. MgSO4 . 7 H2O
What are the formulas for the following compounds:
37. Potassium cyanide
38. Aluminum phosphate
39. Calcium sulfate
40. Ammonium fluoride
41. Sodium phosphate
Write the formula of the compound when each of the following elements bond
42. Aluminum and chlorine
43. Lithium and fluorine
44. Potassium and oxygen
45. Hydrogen and bromine
Answer the following questions:
46. How many moles of aspirin (C9H8O4) are in 2.00g of aspirin?
47. Find the percent composition of the antibiotic streptomycin (C21H29O12N7)
48. The percent composition of DDT, a formerly widely used insecticide, is 47.44%
C, 2.56% H, and 50.00% Cl. What is its empirical formula?
49. A compound containing 20.00% H and 80.00% C has a gram-formula mass of
30.00g. What is the molecular formula of this compound?
50. Calculate the mass of 2.50 moles of CuSO4 .5 H2O
Essay
51. Explain how the mole can be both a number and a quantity of matter