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AP Chemistry

Subjects : science, ap, chemistry
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. AH of formation for a substance in its stablest form (how it is found in nature)






2. Oxidation # of Ions






3. Instrument used to measure the pressure of a not-atmospheric gas (open or closed system)






4. A homogeneous mixture with 1 phase






5. Elements which have unpaired electrons and highly affected by magnetic fields






6. Substances w/ critical temperatures below 25°C






7. ClO2¹?






8. Variable for type of orbital






9. Solid to liquid






10. Colors of Reaction when (Cr2O7 2-) --> (Cr 3+)






11. A device in which chemical energy is changed to electrical energy






12. 1 sigma bond






13. The minimum energy that molecules must possess for collisions to be effective - Ea






14. The line running between the atoms






15. Bond bond in which atoms aren't so different that electrons are completely transferred but are different enough that unequal sharing occurs






16. 2+ charge






17. Generally insoluble anions (names)






18. Henry's Law - solubility of gases is directly proportional to the partial pressure of the gas






19. Combined Gas Law Formula






20. (msubs) Can only be +1/2 or -1/2






21. Molality =






22. Proton donors






23. A neutral molecule/ion having a lone e- pair that can be used to form a bond to a metal ion






24. Measure of the change in enthalpy






25. Symbol for Enthalpy






26. The energy required to raise 1 g of substance 1 degree C






27. I=moles of particles/moles of solute dissolved

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28. Force per unit area






29. Dalton's Law of Partial Pressures (to find partial pressure formula)






30. Carbon & hydrogen compounds






31. These orbitals are perpendicular






32. Half-life equation






33. SO4²?






34. Within a sublevel - place one e? per orbital before pairing them

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35. A single substance that may be an acid or a base (i.e. water)






36. ClO3²?






37. The measurement of heat changes






38. Forward rxn occurs when






39. Vapor pressure lowering - boiling point elevation - freezing point depression - osmotic pressure






40. In a titration - the point where moles of acid are equal to moles of base (just before the indicator changes color)






41. Ionizes to produce H+ ions






42. Point at which liquid?gas occurs






43. CO3²?






44. States molecules at a given temp. vary in kinetic energy along a bell-curve of molecular velocities






45. When n=5 ->2 - color=






46. The reactant in the reduction reaction that forces the oxidation reaction to occur






47. Change without heat transfer between the system and its surroundings






48. 1 sigma bond - 2 pi bonds






49. Heat capacity formula






50. l=3