3. Definitions Structures Bonding Calculations Random Questions $500 $400 $300 $200 $100

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5. Random Questions - $100 ANSWER What is the correct name for the ionic compound, (NH 4 ) 2 SO 3

6. Random Questions - $200 What are the conditions for STP-- temperature and pressure? ANSWER

7. Random Questions - $300 ANSWER Predict AND name the missing product in the following equation: BaCl 2 (aq) + Na 2 SO 4 (aq)  _____ + 2 NaCl (aq) Formula = Name =

8. Random Questions - $400 Which of the following compounds are ionic? –NaOH –CH 4 –NaCl –Al 2 O 3 ANSWER

9. Random Questions - $500 ANSWER Which of the following polyatomic ions has the correct charge? – H 2 PO 3 3- – SO 3 - – C 2 H 3 O 2 2- – CrO 4 2-

10. Calculations - $100 How many molecules are in one mole of nitrogen gas? ANSWER

11. Calculations - $200 ANSWER A sample of hydrogen gas has a volume of 20 liters at STP. Calculate the mass of hydrogen gas present in this gas sample.

12. Calculations - $300 Hydrofluoric acid, an aqueous solution containing dissolved hydrogen fluoride, is used to etch glass by reacting with the silica, SiO2, in the glass to produce gaseous silicon tetrafluoride and liquid water. The balanced equation is: 4HF (aq) + SiO 2 (s)  SiF 4 (g) + 2H 2 O (l) Calculate the mass of hydrogen fluoride needed to react with 5.68g of silica. ANSWER

13. Calculations - $400 Aluminum reacts with chlorine gas to form aluminum chloride according to the balanced equation: 2 Al (s) + 3 Cl 2 (g)  AlCl 3 (s) In a certain experiment, 10.0 g of aluminum is reacted with 35.0 g of chlorine gas. What is the limiting reactant and what mass of aluminum chloride will be produced? ANSWER

14. Calculations - $500 ANSWER A compound has been analyzed and has been found to have the following composition: copper 66.75%, phosphorus 10.84%, oxygen 22.41%. Determine the empirical formula and name(s) of this compound.

15. Bonding - $100 ANSWER Which of these elements has the highest electronegativity? a)Na b)Rb c)Ca d)S e)Cl

16. Bonding - $200 ANSWER True or False? N 2 is an example of a covalent bond.

17. Bonding - $300 ANSWER Which of the following bonds would be the least polar yet still be considered polar covalent? Mg-O C-O O-O Si-O N-O

18. Bonding - $400 ANSWER If atom X forms a diatomic molecule with itself, the bond is… a)Ionic b)Polar covalent c)Nonpolar covalent

19. Bonding - $500 When a molecule has a center of positive charge and a center of negative charge, it is said to have a _______ ________. ANSWER

20. Structures - $100 Which of the following has only nonpolar covalent bonds? N 2 CO HI CCl 4 NaCl ANSWER

21. Structures - $200 Which of the following has a double bond? H 2 O C 2 H 2 C 2 H 4 CN - ANSWER

22. Structures - $300 Which of the following molecules have a linear shape (choose all that apply) HBr NO 3 - H 2 O SF 4 KrCl 4 ANSWER

23. Structures - $400 The Lewis Structure for which of the following contains the greatest number of lone pairs of electrons? CH 4 HF F 2 H 2 O H 2 ANSWER

24. Definitions - $100 When ions are dissolved in water it is said to be a(n) ___________ solution ANSWER

25. Definitions - $200 When electrons fill atomic orbitals, there is a maximum of 2 electrons per orbital. These electrons must have ____________ spins according to the ________ _________ Principle. * What this means is that no 2 electrons in an atom can have the same 4 quantum numbers. ANSWER

26. Definitions - $300 Classify each of the following as either a chemical change or physical change: –You make scrambled eggs –You step on and crush a piece of chalk –You light a candle –Steam from your shower condenses on the mirror ANSWER

27. Definitions - $400 ANSWER ______ is how close you are the correct measurement whereas _____ is how consistent you are in your measurement.

28. Definitions - $500 ANSWER Protons and neutrons are held together in the nucleus by –Electromagnetic repulsion –Nuclear charge –Electrostatic attraction –Nuclear “strong” force

29. ****Answers****

30. Random Questions - $100 DONE (NH 4 ) 2 SO 3 = Ammonium Sulfite

31. Random Questions - $200 DONE 0 degrees Celsius (273 degrees kelvin) and 1 atmosphere

32. Random Questions - $300 DONE BaSO 4 Barium Sulfate

33. Random Questions - $400 –NaOH –NaCl –Al 2 O 3 DONE

34. Random Questions - $500 DONE CrO 4 2-

35. Calculations - $100 1.204 x 10 24 DONE

36. Calculations - $200 DONE 1.80 g H 2

37. Calculations - $300 DONE 7.56 g HF

38. Calculations - $400 DONE 21.9 g AlCl3 can be produced when all of the Cl 2 is reacted, since chlorine gas is the LR.

39. Calculations - $500 Cu 3 PO 4 Copper (I) Phosphate Cuprous Phosphate DONE

40. Bonding - $100 B: I (iodine) DONE

41. Bonding - $200 A: TRUE DONE

42. Bonding - $300 E: N-O DONE

43. Bonding - $400 C: Nonpolar Covalent Bond (occurs between like atoms) DONE

44. Bonding - $500 When a molecule has a center of positive charge and a center of negative charge, it is said to have a DIPOLE MOMENT. DONE

45. Structures - $100 N2N2 DONE

46. Structures - $200 DONE C2H4C2H4

47. Structures - $300 HBr DONE

48. Structures - $400 F2F2 DONE

49. Structures - $500 2 DONE

50. Definitions - $100 DONE Aqueous solution

51. Definitions - $200 DONE Opposite spins (  ) Pauli Exclusion Principle

52. Definitions - $300 DONE –You make scrambled eggs = chemical –You step on and crush a piece of chalk = physical –You light a candle = chemical –Steam from your shower condenses on the mirror = physical

53. Definitions - $400 Accurate ; precise DONE

54. Definitions - $500 The nuclear force (or nuclear “strong” force) is the force between two or more nucleons. It is responsible for binding of protons and neutrons into atomic nuclei. nucleons protonsneutronsatomic nuclei DONE

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