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Random Chemistry Questions

Test your knowledge of chemistry with these random questions on topics such as definitions, calculations, bonding, and structures. Can you answer them all correctly?

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Random Chemistry Questions

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  1. JEOPARDY

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

  3. You have selected an area of the board not in play. OOPS! Click here to go back to the main board

  4. ANSWER Random Questions - $100 • What is the correct name for the ionic compound, (NH4)2SO3

  5. Gases deviate from ideal gas behavior under which types of pressure and temperature conditions? ANSWER Random Questions- $200

  6. ANSWER Random Questions - $300 Predict AND name the missing product in the following equation: BaCl2 (aq) + Na2SO4 (aq)  _____ + 2 NaCl (aq) • Formula = • Name =

  7. According to the solubility rules, which one of the following compounds is INSOLUBLE in water? KNO3 CaBr2 PbCl2 NaOH FeI3 ANSWER Random Questions - $400

  8. ANSWER Random Questions - $500 • Which one of the following sets of quantum numbers is UNACCEPTABLE? n l ml ms a) 2 0 0 +1/2 b) 2 1 1 -1/2 c) 3 0 0 +1/2 d) 4 3 -2 +1/2 e) 3 0 1 -1/2

  9. Consider a sample of nitrogen gas at 63 C with a volume of 3.65 L at a pressure of 4.55 atm. The pressure is changed to 2.74 atm and the gas is cooled to -35 C . Calculate the new volume of the gas. ANSWER Calculations - $100

  10. ANSWER Calculations - $200 A sample of hydrogen gas has a volume of 8.56 L at a temperature of 0 C and a pressure of 1140 mmHg. Calculate then number of moles of hydrogen gas preset in this gas sample.

  11. 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) + SiO2 (s)  SiF4 (g) + 2H2O (l) Calculate the mass of hydrogen fluoride needed to react with 5.68g of silica. ANSWER Calculations - $300

  12. ANSWER Calculations - $400 • Aluminum reacts with chlorine gas to form aluminum chloride according to the balanced equation: 2 Al (s) + 3 Cl2 (g)  AlCl3 (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?

  13. ANSWER Calculations - $500 • 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.

  14. ANSWER Bonding - $100 • Which of these elements has the highest electronegativity? • Na • Rb • Ca • S • Cl

  15. ANSWER Bonding - $200 True or False? N2 is an example of a covalent bond.

  16. ANSWER Bonding - $300 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

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

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

  19. Which of the following has only nonpolar covalent bonds? N2 CO HI CCl4 NaCl ANSWER Structures - $100

  20. Which of the following has a double bond? H2O C2H2 C2H4 CN- ANSWER Structures - $200

  21. ANSWER Structures - $300 Which of the following molecules have a linear shape (choose all that apply) HBr NO3- H2O SF4 KrCl4 I3-

  22. The Lewis Structure for which of the following contains the greatest number of lone pairs of electrons? CH4 HF F2 H2O H2 ANSWER Structures - $400

  23. ANSWER Structures - $500 Draw the Lewis Structures for the following compounds to assist you in answering this question: CBr2H2 BH3 XeCl4 SF4 HCl How many of the compounds are nonpolar?

  24. When ionic compounds are dissolved in water, they break up into ions, allowing this solution will conduct electricity. Solutions that conduct electricity are called _________ solutions. ANSWER Definitions - $100

  25. 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 Definitions - $200

  26. ANSWER 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

  27. ANSWER Definitions - $400 • When liquid oxygen is poured between the poles of a magnet, it “sticks” until boiled away. This shows that the O2 molecule has unpaired electrons, meaning it is _____________ (fill in the blank with paramagnetic or diamagnetic).

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

  29. ****Answers****

  30. DONE Random Questions - $100 (NH4)2SO3 = Ammonium Sulfite

  31. DONE Random Questions - $200 All gases eventually deviate from the ideal model at very low temperature or high pressure.

  32. DONE Random Questions - $300 BaSO4 Barium Sulfate

  33. PbCl2is insoluble because halogens are soluble except with AP and Honors (A = silver ion, P = lead (II) ion, H = mercury (I) ion, Hg22+) DONE Random Questions - $400

  34. DONE Random Questions - $500 n l ml ms e) 3 0 1 -1/2 These quantum numbers are not possible because if the electron is in an s-orbital, as indicated by l = 0, then the only option for ml is 0 (meaning there is only one orbital (box) for the electron to be in).

  35. 4.28 L DONE Calculations - $100

  36. DONE Calculations - $200 0.573 mol H2

  37. DONE Calculations - $300 7.56 g HF

  38. DONE Calculations - $400 21.9 g AlCl3 can be produced when all of the Cl2 is reacted, since chlorine gas is the LR.

  39. DONE Calculations - $500 Cu3PO4 Copper (I) Phosphate Cuprous Phosphate

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

  41. A: TRUE DONE Bonding - $200

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

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

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

  45. N2 DONE Structures - $100

  46. DONE Structures - $200 C2H4

  47. HBr I3- DONE Structures - $300

  48. F2 DONE Structures - $400

  49. 2 DONE Structures - $500

  50. DONE Definitions - $100 • Electrolyte solution

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