AP Chem Test Practice.

Test Preparation AP Test Preparation
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<p>I have an idea. What if we post practice questions for the AP Chem exam everyday, and whomever answers has to post another question so the cycle continues? Does anyone think this would be a good way to practice? </p>

<p>Btw: I'm not entirely new, I used to be registered as EarlySenioritis. </p>

<p>1st question:</p>

<p>Which change increases the mean free path of molecules in a sample of gas?
A. increase in pressure at constant temperature
B. increase in density at constant temperature
C. increase in temperature at constant pressure
D. increase in temperature at constant volume
E. increase in pressure at constant volume</p>

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<p>This is a really effective way to learn. I remember I did this with Physics. </p>

<p>Although, I don't know the answer to your question :(.</p>

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<p>Complete accuracy is not a condition of participation</p>

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<p>Does anyone have the multiple choice 1999 & 2002 AP Chemistry?</p>

<p>I am self-studying for the exam which is coming up. I have all the AP Physics C material if anyone wants (including 2004).</p>

<p>Thanks</p>

<p><a href="mailto:chou.david1@gmail.com">chou.david1@gmail.com</a></p>

5

<p>OK, new question. Because I can't figure out the answer to the first</p>

<p>The electron configuration of the oxide ion is most similar to the electron configuration of the
A. Sulfide ion
B. Nitride ion
C. Oxygen atom
D. Nitrogen atom
E. Fluorine atom
my guess is "C" off the top of my head. Anybody else </p>

<p>Question origin: <a href="http://www.geocities.com/crazytwo2000/%5B/url%5D"&gt;http://www.geocities.com/crazytwo2000/&lt;/a&gt;&lt;/p>

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<p>I like B - then they both the electronic configuration 1s2 2s2 2p6.</p>

<p>8.One atomic mass unit (amu) is closest to the mass of
A. One proton
B. One electron
C. The oxygen-16 nucleus
D. The carbon-12 nucleus
E. 6.02 * 1023 atoms of hydrogen</p>

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<ol>
<li>A, One Proton
The value of Plank’s constant is 6.63 * 10-34 J * s. The velocity of light is 3.0 * 108 m * s-1. Which value is closest to the wave length in nanometers of a quantum of light with frequency of 8 * 1015 sec-1?
A. 3 * 107
B. 4 * 101
C. 5 * 10-18
D. 2 * 10-25
E. 1 * 10-25</li>
</ol>

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<p>Not interested in the round-robin, but since no one answered the first question, I thought I'd let you know it's C. For the mean free path to increase, the gas particles must be spaced farther apart. The only way for temperature to increase while pressure stays the same (as in C) is if volume increases, thereby increasing the mean free path.</p>

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<p>Fight Senioriti's last problem, my answer is 3.75 x 10^-8. none of the answer choices are even close :P</p>

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<p>I'll say A, You probably rounded in a diff. place </p>

<p>In the complete combustion of butane, the products are
A. water and carbon
B. butanone and water
C. butanoic acid and water
D. carbon dioxide and water
E. carbon dioxide and hydrogen</p>

<p>Answer: D, I love always rules</p>

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<p>RESmonkey - your answer is almost right. The answer you got is in meters (since c is in meters). The questions asks for the wavelength in nanometers. Multiply your answer by 10^9 to convert meters to nanometers and you get B.</p>

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<p>alright new question,</p>

<p>Q: All of these moleular shapes can be explained by dsp^3 hybridization of electrons on the central atom EXCEPT</p>

<pre><code>A. Linear
B. T-shape
C. See-saw
D. Octahedral
E. Trigonal Bipyramid
</code></pre>

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<p>D.. kind of a giveaway. Trigonal pyramidal instead of octahedral would make it a trickier question, I think.</p>

<p>FightSenioritis' first problem - I think its E. The F atom has the exact same electron config as the O- ion, which is just the oxygen atom config with an extra electron. Agree?</p>

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<p>
[quote]
The electron configuration of the oxide ion is most similar to the electron configuration of the
A. Sulfide ion
B. Nitride ion
C. Oxygen atom
D. Nitrogen atom
E. Fluorine atom
my guess is "C" off the top of my head. Anybody else

[/quote]

For the record, the answer to this is B. Look at the periodic table. A is a possibility (both oxide and sulfide have -2 oxidation state), but nitride and oxide have the same configuration. Anyway, good luck to all you AP Chem'ers.</p>

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<p>Oh yeah, it is nitride; it has the same config as oxide. I was thinking oxide had a -1 oxidation state for some reason.. dur.</p>

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<p>Which of these would not be basic when in aqueous solution:
A. F-
B. AlCl3
C. NiS
D. K2O
E. NaOH</p>

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<p>Answer: B </p>

<p>If the two half-cells below were combined, what would be the correct chemical equation to represent the spontaneous REDOX process?</p>

<p>Cu2+ + 2e- <====> Cu (+0.34V)<br>
<a href="http://www.adriandingleschemistrypages.com/apquiz.htm%5B/url%5D"&gt;http://www.adriandingleschemistrypages.com/apquiz.htm&lt;/a&gt;&lt;/p>

<p>H+ + e- <====> 1/2 H2 (0.00V)</p>

<p>(A) Cu2+ + H+ ==> 1/2 H2 + Cu
(B) Cu2+ + 2H+ ==> H2 + Cu
(C) Cu2+ + 1/2 H2 ==> H+ + Cu
(D) Cu2+ + H2 ==> 2H+ + Cu
(E) Cu + 2H+ ==> H2 + Cu2+</p>

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<p>Answer: D</p>

<p>Can you go over thegeneralguy's question, and why its B.</p>

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<p>Although I can't come up with a concrete explanation, Al3+ is capable of forming acids. The Al(H2O)63+ ion (I think) is involved.</p>

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<p>AlCl3 is a very good acid because it has an empty orbital capable of accepting electrons to form a bond.</p>