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CLEP Chemistry 1

Subjects : clep, science, 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 hypothetical ideal gas obeys exactly the mathematical statement of the ideal gas law. This statement is also called the _____ ___ ____ of an ideal gas because it relates the variables (P - V - n - T) that specify properties of the gas.






2. A principle stating that when a system at equilibrium is disturbed by the application of a stress (change in temperature - pressure - or concentration) it reacts to minimize the stress and attain a new equilibrium position.

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3. A chemical reaction formed from the breakdown of a compound into its individual elements or compounds.






4. The force with which the electrons flow from the negative electrode to the positive electrode through an external wire is called?






5. A law that states that under conditions of constant temperature and pressure - equal volumes of different gases contain equal numbers of molecules.






6. The molecules in a gas are in constant - continueous - random - and straight-line motion.






7. The pressure exerted by each gas in a mixture is called its _____ pressure.






8. The process of mixing different orbitals of the same atom to form a new set of equivalent orbitals.






9. The process of determining the amount of a solution of known concentration that is required to react completely with a certain amount of a sample that is being analyzed.






10. *The nature of the reactants and products affect chemical reactions because some elements and compounds have bonds that when broken/formed - react more rapidly with each other than others.






11. The enthalpy changes associated with the reactions that correspond to the formation of a substance from its free elements are called?






12. The normal boiling point of a liquid is the temperature at which its vapor pressure is 760mm Hg.






13. **As we proceed to the right of the table - ______-forming properties decrease and _____-forming properties increase.






14. The average kinetic energy of all the molecules collectively is directly proportional to the absolute temperature of the gas. The average kinetic energy of equal numbers of molecules of any gas is the same at the same temperature.






15. The solubility of gases in liquid or solid solvents always increases with ________ pressure.






16. *The surface area exposed affect chemical reactions because most reactions depend on the reactants coming into contact - increasing the rate of the reaction.






17. This process occurs when the system is thermally isolated so that no heat enters or leaves.






18. The energy required to remove an electron from an isolated atom in its ground state.






19. The law stating that in any spontaneous process there is an increase in the entropy of the universe.






20. A chemical reaction where one substance is displacing another. ex: Fe + CuSo4 -> FeSo4 + Cu.






21. A law that states that for a given mass of gas - the volume is proportional to the pressure and absolute temperature.






22. Decreasing the concentrations of reactants shifts the equilibrium to the ______ - thus decreasing the concentration of products formed.

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23. In a closed system - when opposing changes are taking place at equal rates - the system is said to be in _____ _______.






24. This law states that the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of the gases in mixture.






25. In an endothermic process - energy is absorbed and ^E is _______.






26. *Each wave function corresponds to a certain electron energy and describes a region about the nucleus (orbital) where an electron having that energy may be found.






27. A law stating that at a constant temperature - the volume of a gas in inversely proportiona to the pressure.






28. Electronegativities ________ from left to right in a period.






29. The heat required to change 1mole of solid completely to vapor.






30. A solution in which solid solute is in equilibrium with dissolved solute.






31. Reactions that do not occur spontaneously can be forced to take place by supplying energy with an external current.






32. Metals have electronegativities less than ____






33. For a cell at concentrations and conditions other than standard - a potential can be calculated using this equation.






34. The molecules in a gas collide with one another - but the collisions are perfectly elastic (they result in no net loss of energy).






35. A law stating that at constant pressure - the volume of a given quantity of a gas varies directly with the temperature.






36. An increase in temperature causes the position of equilibrium of an exothermic reaction to be shifted to the _____ - while that of and endothermic reactions is shifted to the _______.

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37. A hypothetical gas would follow Boyles law under all conditions and is called?






38. *Molecules of ideal gases have no attraction for one another and have no intrinsic volume - they are ______ _____






39. A pure crystal of elemental metal consists of roughly Avogrado's number of atoms held together by ________ bonds.






40. When the rate of evaporation equals the rate of condensation - the system is in __________.






41. When a hydrogen atom is bonded to a highly electronegative atom - it will become partially _____-charged - and will be attracted to neighboring electron pairs. This creates a hydrogen bond. The more polar the molecule - the more effective the hydroge






42. The pressure exerted by the gas molecules when they are in equilibrium with the liquid.






43. Liquids with strong attractive forces have ______ boiling points.






44. A process that occurs whent eh system is maintained at constant pressure.






45. Electronegativities _______ as you go down a group.






46. The amount of heat energy required to raise the temperature 1g of a substance by 1 degree celcius.






47. The pressure of a gas is the result of collisions between the gas molecules and the walls of the container.






48. The ________ of an element is a number that measerures the relative strength in which the atoms of the element attract valence electrons in a chemical bond - on a scale of 0-4.






49. Rays made up of electrons in basic electron charges.






50. The change in enthalpy of an endothermic reaction is ________.