Mrs. Umbarger. Growth Model. 1. Changes easily manipulated and that do not alter a substances composition are a. chemical b.

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1 Mrs. Umbarger Chemistry Growth Model Name Date Per. 1. Changes easily manipulated and that do not alter a substances composition are a. chemical b. physical 2. Properties or changes that alter a substance s composition are a. chemical b. physical 3. Mixtures can be separated by all of the following means EXCEPT a. filtration b. chemical reaction c. centrifuge d. chromatography 4. All of the following statements describe a gas EXCEPT a. it does not flow b. the molecules expand to fill the container c. it is easily compressed d. has an indefinite shape, indefinite volume 5. When adding numbers written in scientific notation, you must adjust the numbers so that you have a constant exponent. a. true b. false 6. When multiplying numbers written in scientific notation, you must multiply the exponents that are in the two original numbers. a. true b. false 7. Qualitative data is expressed in a. graphs b. numbers c. words d. both a and b 8. Quantitative data is expressed in a. graphs b. numbers c. words d. both a and b ml is equal to how many liters? a. 140 L b. 14 L c. 1.4 L d L 10. The metric unit for mass is a. grams b. liters c. meters d. none of the above 11. How many moles are in 12.2 L of oxygen gas? a. 0.5 moles b. 1 mole c. 1.5 moles d. 2 moles

2 12. A ratio where the 2 measurements always equal one is 13. Contains a coefficient that is equal to or greater than one and less than ten 14. Which of these is a balanced chemical equation? a. C 6 H 12 O O 2 6 CO H 2 O b. C 6 H 12 O O 2 3 CO H 2 O c. C 6 H 12 O O 2 6 CO H 2 O 15. A number written as product of a coefficient and a power of Two isotopes of the same element have to share all of the following characteristics EXCEPT a. atomic number b. proton number c. electron number d. neutron number 17. The dense central portion of an atom is called the a. proton b. neutron c. electron d. nucleus 18. All describe the atomic number EXCEPT a. is equal to the number of protons b. is equal to the number of neutrons c. is equal to the number of electrons d. is equal to its mass 19. The following sublevels in order of increasing energy are a. 1s 2s 3s 4s 2p 3p 3d b. 1s 2s 2p 3s 3p 3d 4s c. 1s 2s 2p 3s 4s 3p 3d d. 1s 2s 2p 3s 3p 4s 3d 20. Rubidium has 2 naturally occurring isotopes. The relative abundance of rubidium-85 is 72.17% with an atomic mass of amu. The relative abundance of rubidium-87 is 27.83% with an atomic mass of amu. The atomic mass for rubidium is a amu b amu c amu d amu 21. In a covalent bond, a a. metal atom bonds with another metal atom b. nonmetal atom bonds with another nonmetal atom c. metal atom bonds with a nonmetal atom

3 22. In an ionic bond, a a. metal atom bonds with another metal atom b. nonmetal atom bonds with another nonmetal atom c. metal atom bonds with a nonmetal atom 23. In a covalent bond, electrons are a. transferred b. produced c. not involved d. shared 24. In an ionic bond, electrons are a. transferred b. produced c. not involved d. shared 25. Using this balanced equation, 2 C 3 H O 2 6 CO H 2 O, how many moles of C 3 H 6 are needed to produce 18 moles of CO 2? a. 3 b. 6 c. 9 d Calculate the molar mass of Cu(NO 3 ) 2 a amu b amu c amu d amu 27. Determine the molecular formula of a compound that has the empirical formula of C 2 H 3 O 2 and a molecular formulas mass of g. a. C 2 H 3 O 2 b. C 4 H 6 O 4 c. C 6 H 9 O 6 d. CHO 28. Determine the percent composition of Ag 2 CrO 4. a. Ag = 33%, Cr = 33%, O = 33% b. Ag = 28.5%, Cr = 14%, O = 57% c. Ag = 65%, Cr = 15%, O = 19% d. Ag = 61%, Cr = 30%, O = 9% 29. A reaction where the atoms of one element replace the atoms of a 2 nd is a 30. A reaction where a single compound is broken down into simpler substances is 31. A reaction where oxygen reacts with another substance producing heat a. combustion b. decomposition reaction 32. A reaction where ionic compounds dissociate in aqueous solutions then reform a. combustion b. decomposition reaction

4 33. A reaction where 2 substances react to form a single new compound 34. A balanced equation demonstrates the law of a. conservation of energy b. conservation of matter c. conservation of mass d. all of the above 35. A substance that is not used up in a reaction but affects the reaction rate is a. a product b. a reactant c. a catalyst d. all of the above 36. Avagadro s number is best defined as a. a mole of atoms b. a mole of molecules c x rep. particles d. all of the above 37. A coefficient in a balanced chemical equation indicates a. the mass of the substance b. the charge of the substance c. the atomic number of the sub. d. the moles of the substance 38. How many moles are in 2000g of manganese? a moles b moles c d. 109,880 moles 39. How many grams are in 9.32 x atoms of zinc? a x 10 6 b x 10 3 c. all of the above d. none of the above 40. In order to increase the reaction rate one would a. increase temperature b. increase concentration c. increase surface area d. all of the above 41. A reaction that releases heat is called a. activation b. endothermic c. exothermic d. spontaneous 42. A bond that creates charged particles by gaining or losing electrons is called a. a compound b. an ionic bond c. a nonpolar covalent bond d. a polar covalent bond 43. The groups of the periodic table correspond with an atom s a. total number of electrons b. number of valence electrons c. number of protons d. energy levels

5 44. Valence electrons are electrons located in the a. outer most energy level b. entire set of orbitals c. inner most energy level d. nucleus of the atom 45. The significant of valence electrons is that they determine an atom s a. color b. mass c. reactivity d. density 46. For most elements, a full highest energy level means having a. 2 electrons b. 2 protons c. 8 electrons d. 8 protons 47. To gain a full set of electrons, atoms tend to electrons. a. gain b. lose c. share d. all of the above 48. Cations are charged ions that result when atoms electrons. a. negatively, gain b. negatively, lose c. positively, gain d. positively, lose 49. Anions are charged ions that result when atoms electrons. a. negatively, gain b. negatively, lose c. positively, gain d. positively, lose 50. The horizontal rows of the periodic table correspond with an atom s a. total number of electrons b. number of valence electrons c. number of protons d. energy levels