CHEM 104 Final Exam Questions and Answers

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CHEM 104 Final Exam Questions and Answers (Verified Answers)

• The ability of an atom in a molecule to attract electrons is best

quantified by the .

• paramagnetism
• diamagnetism
• electronegativity
• electron change-to-mass ratio

e. first ionization potential: C. electronegativity

• In the Lewis structure of ClF, the formal charge on Cl is and the

formal charge on F is .

• -1, -1
• 0, 0
• 0, -1
• +1, -1

e. -1, +1: B. 0, 0

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• Which of the following has the most negative electron affinity?
• Be
• N
• C
• Br

e. Cs: D. Br

• A sample of oxygen gas was found to

effuse at a rate equal to three times that of an unknown gas. The molecular weight of the unknown gas is g/mole.

• 288
• 96
• 55
• 4

e. 10.7: A. 288

• What is the molarity of permanganate ion in a 0.030 M solution of ferric

permanganate?

• 0.010 M
• 0.015 M
• 0.030 M
• 0.060 M

e. 0.090 M: E. 0.090 M

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• If the volume of a cylinder-piston arrangement containing a gas is increased by

a factor of eight and the temperature is doubled, the pressure

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