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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. The lowest energy configuration for an atom is the one having the max number of unpaired electrons allowed by the Pauli principle in a set of degenerate orbitals

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2. A device used to measure Delta H






3. Positive ion






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






5. Mass/volume






6. Function in which it doesn't matter HOW the changes take place - only that they do; you can use to formula Final - Initial ( i.e. energy - pressure - volume - temperature - sort of moles)






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






8. Happens at lines in phase change charts






9. This MUST be determined experimentally






10. Substances that form H+ when dissolved in water; proton donors






11. AX6






12. U(rms)=(3RT/M)^1/2






13. The weighted average of all the isotopes that an atom can have (in g/mol)






14. OIL RIG






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






16. Matter can't be created nor destroyed






17. Formula used when diluting stock solution (to find amount of water or stock needed)






18. AX2 - AX2E3






19. C2O4²?






20. Has values 1 -2 -3 -...; tells energy levels






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






22. Transition metals with ammonia - hydroxide - cyanide or thiocyanate form...






23. r=k[A]^2






24. Spontaneous emission of radiation






25. AX5






26. Boltzmann constant - used in calculating speed of gas per molecule






27. Mols A/ total mols - XA






28. Diatomic Molecules






29. 760mmHg/Torr






30. Thickness






31. SO4²?






32. Organic reaction in which two functional groups come together - resulting in the release of water






33. Anions or cations as needed to produce a compound with non net charge






34. 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

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35. Mass #






36. Ecell= E°cell -RT/nF x lnQ






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






38. (organics) six carbons






39. Group 1 and heavier Group 2 bases






40. Significant Digits of counted things






41. Only contains ions that change in reaction






42. # bonding e- - # antibonding e-/2






43. Mole Fraction






44. Ptotal=P1+P2+P3+...

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






46. Calculation from K to C






47. If K<1 - then Gº>0 and reaction will be...at chemical equilibrium






48. Energy required for liquid?gas






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






50. Heat needed to change 1 g of substance to 1°C