CHEM111F14_E1blank - CHEM111 Case ID E1 Name Fall 2014 This 50-minute exam has 11 questions over 6 pages Show all work and include all units for full

CHEM111F14_E1blank - CHEM111 Case ID E1 Name Fall 2014 This...

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CHEM111 E1 Fall 2014 Case ID Name This 50-­‐minute exam has 11 questions over 6 pages. Show all work and include all units for full credit. Pay attention to the following point values and plan your time accordingly. Be sure to write your name on the second page of the exam. 1-­‐7: 14 points 10: 24 points 8: 18 points 11: 24 points 9: 20 points Constants and equations: Speed of light: c = 2.997x10 8 ms -­‐1 Plank’s constant: h=6.626x10 -­‐34 J∙s 1 J = 1 kg∙m 2 ∙s -­‐2 charge of an e -­‐ : e = 1.602x10 -­‐19 C mass of e -­‐ : m e =9.11x10 -­‐31 kg mass of p + : m p =1.67x10 -­‐27 kg ࠵? = ࠵? Avogadro’s constant: N A = 6.022x10 23 mol -­‐1 I am the person whose name appears on this exam and I followed the procedures stated in the Case Western Reserve University Academic Integrity section of the student handbook. Signature
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CHEM111 E1 Fall 2014 Name 1) Which statement is not correct? In atomic mass units (amu), __________ a. the mass of an electron, proton, or neutron is approximately 1 amu. b. the mass of a carbon-12 atom is exactly 12 amu. c. the mass of a proton or neutron is approximately 1 amu, and the mass of an electron is approximately 0 amu. d. the mass of an oxygen-16 atom is not exactly 16 amu. e. the mass of an atom is approximately equal to the number of protons and neutrons in the nucleus of the atom.
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