Exam+1_July+9th

Exam+1_July+9th - Chem 1310 SF Exam 1 Professor Azizi Name:...

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Chem 1310 SF Name: ______________________ Exam 1 Professor Azizi Date: ________________ There are 20 questions; each question is worth 5 points. Please circle the appropriate answer. No partial credit will be given. 1. The law of conservation of mass states that: a) Mass is neither created nor destroyed in a chemical change. b) Mass is created and destroyed during a chemical change. c) Matter and mass are both created and destroyed during a chemical change. d) All of the above e) None of the above 2. How many of the following did Dalton not discuss in his atomic theory? I. isotopes II. ions III. protons IV. neutrons V. electrons a) 1 b) 2 c) 3 d) 4 e) 5 3. The element rhenium (Re) exists as two stable isotopes and 18 unstable isotopes. 185 Rhenium has in its nucleus a) 75 protons, 75 neutrons. b) 75 protons, 130 neutrons. c) 130 protons, 75 neutrons. d) 75 protons, 110 neutrons. e) None of the above
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Chem 1310 SF Name: ______________________ Exam 1 Professor Azizi Date: ________________ 4. How many protons, neutrons, and electrons does the atom 39 K have? a) 19 protons, 19 neutrons, 30 electrons b) 20 protons, 20 neutrons, 19 electrons c) 19 protons, 19 neutrons, 19 electrons d) 20 protons, 19 neutrons, 20 electrons e) 19 protons, 20 neutrons, 19 electrons 5. Adipic acid contains 49.32% C, 43.84% O, and 6.85% H by mass. What is the empirical formula? a) C
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Exam+1_July+9th - Chem 1310 SF Exam 1 Professor Azizi Name:...

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