1 / 37

Chapter 7 Review (Part II)

Chapter 7 Review (Part II). CP Chemistry Mrs. Klingaman. Q :1. What types of atoms are covalent (aka: molecular) compounds made of?. A :1. nonmetals. Q :2. True or False: When naming ionic compounds, roman numerals are used to express the charge of the transition metal ion. A:2. True.

tavita
Download Presentation

Chapter 7 Review (Part II)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 7 Review(Part II) CP Chemistry Mrs. Klingaman

  2. Q:1 What types of atoms are covalent (aka: molecular) compounds made of?

  3. A:1 nonmetals

  4. Q:2 True or False: When naming ionic compounds, roman numerals are used to express the charge of the transition metal ion.

  5. A:2 True

  6. Q:3 What is the prefix used for the number 7?

  7. A:3 hepta

  8. Q:4 What is the name of the compound CuS?

  9. A:4 copper (II) sulfide

  10. Q:5 What is the chemical formula for aluminum oxalate?

  11. A:5 Al2(C2O4)3

  12. Q:6 What is the name of compound N2H4?

  13. A:6 dinitrogen tetrahydride

  14. Q:7 What are the units for molar mass?

  15. A:7 g/mol

  16. Q:8 What is the molar mass of lithium phosphate?

  17. A:8 Li3PO4 MM = 115.8 g/mol

  18. Q:9 What is the % by mass of calcium in Ca(NO3)2?

  19. A:9 MM = 164.1 g/mol (40.1/164.1) x 100 = 24.44 % Ca

  20. Q:10 Which of the following is not a diatomic molecule: O2, N2, K2, or Br2?

  21. A:10 K2 Br-I-N-Cl-H-O-F

  22. Q:11 What is Avogadro’s number ? (including proper units)

  23. A:11 6.022 x 1023 atoms or molecules /1 mole

  24. Q:12 How many mols are there in 1.95 x 1025 molecules of CO2?

  25. A:12 1.95 x 1025molec. CO2 1 mol CO2 6.022 x 1023molec. CO2 = 32.38 mols CO2

  26. Q:13 What is the mass, in grams, of 0.78 mols of barium carbonate?

  27. A:13 BaCO3 0.78 mols BaCO3 197.3 g BaCO3 1 mol BaCO3 = 153.9 g BaCO3

  28. Q:14 A sample of sodium hydroxide has a mass of 15.2 grams. How many molecules of sodium hydroxide does it contain?

  29. A:14 NaOH 15.2 g NaOH 1 molNaOH 6.022 x 1023molec. NaOH 40 g NaOH 1 molNaOH = 2.29 x 1023molec. NaOH

  30. Q:15 Which of the following would be considered an empirical formula? P3O9 , N4H7, or C2H4O2 ?

  31. A:15 N4H7

  32. Q:16 The stimulant nicotine is found to be 74.03% carbon, 17.27% nitrogen, and 8.70% hydrogen. What is its empirical formula?

  33. A:16 C5H7N

  34. Q:17 What is the % by mass of oxygen in tin (IV) oxide?

  35. A:17 SnO2 MM = 150.7 g/mol (32/150.7) x 100 = 21.23 % O

  36. Q:18 What is the mass, in grams, of 2.11 mols of phosphorpustrichloride?

  37. A:18 PCl3 2.11 mols PCl3 137.5 g PCl3 1 mol PCl3 = 290.1 g PCl3

More Related