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






2. Raoult's Law - relations between vapor pressure and concentrations






3. How to Find a Weighted Average






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






5. Half cell in which oxidation occurs






6. Organic w/ -O-






7. AX4






8. Dirrect Method Formula






9. A device used to measure Delta H






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






11. r=k[A]^2






12. Unusually strong dipole forces found when H is bonded to N - O - or F






13. Type of system in which nothing is transfered (no mass or energy); ideal






14. Type of system in which the energy and mass may leave or enter






15. ClO3²?






16. Amount of gravitational force exerted on an object






17. Solution in flask being titrated






18. 109.5° - sp^3






19. kb of water






20. If needed - indicate charge of metal(cation) by...






21. Larger molecules which have higher mass and therefore electron density have stronger...






22. Energy required to break a bond






23. Group 1 and heavier Group 2 bases






24. Atoms combine in fixed whole # ratios






25. Stronger IMF= lower... weaker IMF= higher...






26. Consists of a complex ion - a transition metal with attached ligands - and counterions






27. Energy required for melting to occur






28. Instrument used to measure the pressure of atmospheric gas






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






30. Assumes that a molecule is composed of atoms that are bound together by sharing pairs of electrons using the atomic orbitals of the bound atoms






31. AX3E






32. Negative enthalpy - heat flows into surroundings






33. Organic w/ -NH2






34. When two elements form a series of compounds - the ratios of the masses of the second element that combine with 1g of the first element can always be reduced to whole numbers






35. Proton donors






36. Freezing point depression formula






37. All forms of energy except for heat






38. Increase Volume






39. =vM2/M1






40. Raising heat - adding catalyst - heighten concentration - bigger surface area






41. The entropy of a pure perfectly formed crystal @0K is 0






42. Determined by the formula h/m(in kg)v - (v=velocity)






43. When more than one valid Lewis structure can be written for a particular molecule; represented by double-headed arrows






44. If a change is imposed on a system at equilibrium - the position of the equilibrium will shift in a direction that tends to reduce that change


45. The reactant that is being oxidized - brings about reduction






46. Pairs of electrons localized on an atom






47. Substance in which something is dissolved in a solution (higher [ ])






48. Point at which vapor pressure=air pressure above






49. 0.00°C - 1 atm






50. Mass reactants= mass products