Midterm1CFall07

Midterm1CFall07 - Midterm Exam 1 C 1. Which Exam are you...

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Midterm Exam 1 C 1. Which Exam are you taking? a) Midterm 1 A b) Midterm 1 B c) Midterm 1 C d) Midterm 1 D e) Midterm 1 E 2. Which of the following organic compounds has the lowest molecular weight? (Atomic weights: C = 12.01, O = 16.00, F = 19.00, H = 1.008) a) C 4 H 8 F 2 O 2 b) C 3 H 5 F 3 O 2 c) C 5 H 8 FO 2 d) C 4 H 7 FO 3 e) C 3 H 6 F 2 O 3 3. A sample of the compound M 2 SO 4 weighing 0.1688 g reacts with BaCl 2 to give 0.2772 g BaSO 4 . What is the atomic weight of the element M? (Atomic weights: S = 32.06, O = 16.00, Ba 137.3) a) 6.94 b) 23.0 c) 39.1 d) 24.3 e) 40.1 1
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4. Silicon (atomic weight 28.0855) has three naturally-occurring isotopes with isotopic weights 27.97693, 28.97649 and 29.97376. The abundance of the lightest isotope is 92.21%. What is the percentage abundance of the heaviest isotope? a) 6.3 b) 5.2 c) 3.9 d) 3.1 e) 2.6 5. What is the chemical name of Sc 2 (CrO 4 ) 3 ? a) scandium (II) chromate b) scandium (II) dichromate c) scandium (III) chromate d) scandium (III) dichromate e) scandium (II) chromite 6. What is the symbol for the bisulfite ion? a) HSO 4 b) HSO 3 c) HSO 3 2– d) HSO 4 2– e) H 2 SO 4 2
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7. The species contains: 32 16 S 2- a) 16 protons and 18 neutrons b) 18 protons and 16neutrons c) 16 protons and 18 electrons d) 18 electrons and 32 neutrons e) 16 protons and 16 electrons 8. Which of the following samples has the largest mass? a) 25 g lead (density = 11.3 g/cm
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This note was uploaded on 07/17/2008 for the course CHEM 121 taught by Professor Wyzlouzil during the Fall '07 term at Ohio State.

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Midterm1CFall07 - Midterm Exam 1 C 1. Which Exam are you...

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