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USA Physics and Chemistry Contests
National Chemistry Olympiad
2007 National Chemistry Olympiad
42
42
Part of
2007 National Chemistry Olympiad
Problems
(1)
2007 USNCO Problem 42
Source:
3/12/2013
The mass of metal deposited by the electrolysis of an aqueous solution of metal ions increases in direct proportion to which property?
I. electrolysis current
\text{I. electrolysis current}
I. electrolysis current
II. electrolysis time
\text{II. electrolysis time}
II. electrolysis time
III. metal ion charge
\text{III. metal ion charge}
III. metal ion charge
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I only
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III only
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I and II only
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I, II, and III
<span class='latex-bold'>(A)</span>\ \text{I only} \qquad<span class='latex-bold'>(B)</span>\ \text{III only} \qquad<span class='latex-bold'>(C)</span>\ \text{I and II only} \qquad<span class='latex-bold'>(D)</span>\ \text{I, II, and III}\qquad
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I only
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III only
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I and II only
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I, II, and III
direct proportion