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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. Symbol for Enthalpy






2. Oxidation # of Oxygen






3. R=






4. Mol/L - concentration of a solution






5. Change in Energy = ? (in terms of constant pressure; for gasses)






6. Donates a single H+ Ion (... other prefixes also)






7. Energy needed to vaporize a mole of a liquid






8. HF+ OH??H2O






9. (N) number of equivalents per liter of solution






10. Oxidation # of Halogens






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






12. Variable for orientation of orbital (-1 through +1)






13. NO3¹?






14. Connects the 2 half cells in a voltaic cell






15. Weakest IMFs - found in all molecules






16. AX5






17. The measurement of heat changes






18. Point at which the titrated solution changes color






19. Proton acceptors - must have an unshared pair of e?s






20. Rate of Diffusion/Effusion formula






21. ... compounds are most conductive






22. We cannot simultaneously determine an atom's exact path or location






23. (# of valence e- on free atom) - (# of valence e- assigned to atom in molecule)






24. Energy can't be created nor destroyed






25. The total entropy is always increasing - all systems tend towards maximum entropy






26. 90° - d^2sp^3






27. Entropy in the universe is always...






28. Effusion of a gas is inversely proportional to the square root of the molar mass

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29. All _________ compounds are electrolytes






30. Change that occurs at constant temperature






31. Kinetic Energy of an individual particle formula






32. For significant digits - leading zeros ____ significant






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






34. Pairs of electrons localized on an atom






35. R=






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






37. (organics) double-bonded compound






38. (organics) six carbons






39. In ideal gas law problem - when it says "atmospheric" ...






40. 0.00°C - 1 atm






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






42. Amount of heat needed to change a system by 1°C






43. Oxidation # of free elements






44. Has values from 0 to (n-1); tells shape of atomic orbitals






45. AX5E






46. neutron (symbol)






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






48. Polyatomic Ions (bonding)






49. Oxidation # of Compounds






50. l=2