<p>I got 1-5 the same as yours but wasn’t it for the lowest 2nd ion. enegry - Ca and for the half-filled d orbital - Cu. though i’m not quite sure for them. i don’t remember any Phosphorus in this question. </p>
<p>General comments — This exam was pretty f’ing hard. I read through the Princeton Review book about 3x, did all the problems after each lesson (and usually missed no more than 1 per section), and still left around 13 blank.</p>
<p>I’m pretty sure Sr has a lower second ion energy than Ca because it’s lower on the periodic table, and ionization energy increases as you go from bottom to top, and left to right. Sr also has two valence electrons like Ca does.</p>
<ol>
<li>Fusion</li>
<li>Alpha decay</li>
</ol>
<p>Here are some I had trouble with:
18. Forms oxidation state of +4: ??? (omit)
19. When mixed with soap produces ppt: Ca?
21. Forms blue color when dissolved in sulfate: ??? (omit)</p>
<p>When H ion. energy is decreased from n=2 to n=1, a photon is emitted: True?
The p orbital only holds 2 valence: Definitely true
No CE?</p>
<p>XH3, X = Phosphorus?</p>
<p>To be a polar molecule the shape needs to be t. pyramidal (XH3)?</p>
<p>Balancing equations: Na2O2 + H20 etc. etc. Coeff of O2 = 1? (did in 15 sec)</p>
<p>Which one requires energy input: Formation of H2 gas from two H atoms?</p>
<p>Given [HAc] = 1.8x10^-5M, you can tell it’s a weak acid?</p>
<p>What would you not use to measure titrations: balance</p>
<p>B-L acid/conjugate: H20 was acting as the B-L acid (donated H+ ion)</p>
<ol>
<li><p>Water has a high boiling point for its atm mass: True
Hydrogen bonding is strong: True
Correct explanation</p></li>
<li><p>Answer: London dispersion (weak intermolecular forces)?</p></li>
</ol>
<p>For the one with teh T increase, yes i got it the same :)</p>
<p>But 56 i think asked for something more than just the weakest bonds. London forces are typical for inert gases only, so covalent bonds was better answere, though i’m not much sure.</p>
<p>P/V const . - 90% sure Any other opinions??!</p>
<p>I only had 3 TTCE’s but that was the one section on the test where I think I took a big hit. For 56 I put hydrogen bonds I think (but that’s just me), but I thought it asked about strongest bonds, oh well I guess I misread.</p>
<p>What did everyone put for the greenhouse CO2 problem? I put T T (incorrect explanation).</p>
<p>And there was that one roman numeral question toward the end of the test that had Zn ions and stuff in it; I forgot how to do that type of problem (I believe it had Zn ions H20 and something else as choices). I put only the Zn ions would form from the given choices (roman numeral II).</p>
<p>Yeah I got TT CE for 101 as well, it took me a while to figure out but then it made sense in terms of boiling point elevation, colligative properties, etc.</p>
<p>There was a guestion about 10g of Ar and some N2. And it asked about the liters or teh grams of N2 present. I left it blank. I got 44,8 but there wasn’t such an answere. There was 22,4 and 49.</p>