MathDB
Problems
Contests
National and Regional Contests
USA Contests
USA Physics and Chemistry Contests
National Chemistry Olympiad
2009 National Chemistry Olympiad
2009 National Chemistry Olympiad
Part of
National Chemistry Olympiad
Subcontests
(2)
43
1
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2009 USNCO Problem 43
Which properties of electromagnetic radiation are inversely related?
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amplitude and frequency
<span class='latex-bold'>(A)</span>\ \text{amplitude and frequency} \qquad
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amplitude and frequency
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energy and wavelength
<span class='latex-bold'>(B)</span>\ \text{energy and wavelength} \qquad
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energy and wavelength
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energy and frequency
<span class='latex-bold'>(C)</span>\ \text{energy and frequency} \qquad
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energy and frequency
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wavelength and amplitude
<span class='latex-bold'>(D)</span>\ \text{wavelength and amplitude}\qquad
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wavelength and amplitude
42
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2009 USNCO Problem 42
The deposition of
1.0
1.0
1.0
g of which element from its molten chloride requires the shortest time at a currently of 1 A?
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Na
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Mg
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Al
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Ba
{ <span class='latex-bold'>(A)</span>\ \text{Na} \qquad<span class='latex-bold'>(B)</span>\ \text{Mg} \qquad<span class='latex-bold'>(C)</span>\ \text{Al} \qquad<span class='latex-bold'>(D</span>}\ \text{Ba} \qquad
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Na
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Mg
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Al
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Ba