May 2010 Chemistry

Test Preparation SAT Subject Test Preparation
241

<p>Nice. </p>

<p>(10char)</p>

242

<p>:( I think I’m looking at a raw score around 68 or less right now. Probably less.</p>

243

<p>I think i’m still at 70 something.</p>

244

<p>You guys sure? I mean how can a double bonded C2 atom have any isomers!? Or was this just not one of the choices…(I don’t exactly remember the choices too well). But yeah Mycolwin, that was my reasoning when i picked the CH2Cl2. I’ll ask my chem teacher tommorrow to make sure, he’s a genius :P</p>

245

<p>^ Don’t ruin my confirmation bias.</p>

246

<p>Again, look at my explanation a couple pages back. /Pretty/ darn sure it’s (A). CH2Cl2 is the least likely to have an enantiomer. All of the molecules can have mirror images, but it’s a matter of whether the two images are different.</p>

247

<p>I think people just have a hard time accepting the truth :stuck_out_tongue:
I’m absolutely sure it was CH2Cl2.</p>

248

<p>Hey, I mean I put CH2Cl2 so I’d be absolutely fine with that being the correct answer. I’m just saying, I’m not sure. In fact, I really hope that it is…I’d take +1 over -.25 anyday. I was just saying if there was a C2 double bonded molecule, that would definitely not have an isomer. At this point, I’m guessing that wasn’t even a choice… So congrats to everyone who put CH2Cl2 :D</p>

249

<p>wat woud be a probable raw score to reach 800?</p>

<p>I took my chem test this month</p>

250

<p>^ See the curve in post #198.</p>

251

<p>you can generate H2 from an active metal and an acid. H2 is almost insoluble in h2o and can be collected that way. It has nothing to do with its density.</p>

252

<p>ketones and aldehydes are isomers and they have double bonds.</p>

253

<p>^ dude…just ugh</p>

254

<p>is 740 a decent score? or should i retake to try to get above 750?</p>

255

<ol>
<li>Seriously disappointed. Retaking in June.</li>
</ol>

256

<p>I managed an 800. :)</p>

257

<p>800 for me too! :)</p>

258

<p>800 :slight_smile: yayayayayay</p>

259

<ol>
<li>it was within my expectation.</li>
</ol>

260

<p>(#8) is Al the one that acts as both acid and base? </p>

<p>Al(OH)3 + H+ –> Al+++ + H2O (as base)
Al(OH)3 + OH- –> Al(OH)4- (as acid)</p>

<p>this is often seen in AP chem, too.</p>