<p>Yeah, the gas/liquid one was F/F, it said something about net energy and bonds breaking...though I don't remember it exactly...</p>
<p>There were also two questions to which the first parts were "A mole of any ideal gas always occupies 22.4 L" and "the enthalpy of formation of CO2 at 298 K and 1 atm can vary," but I don't remember the second part to either of them.</p>
<p>lets just forget about it...not much we can do now</p>
<p>xyzzy240 or anyone.
overall, do you think this test leans more to a difficultside or easy side? I am worried about the curve. Many people from the beginning of this thread said it was really hard.
Let's say 4 skipped and 3-5wrong, what do you think the score will be for this particular test?</p>
<p>difficult or easy? that depends on preparation</p>
<p>i'd say - expect 740-780...</p>
<p>I thought it was on the easy side, but 4 omits and 5 wrong shouldn't put you below a 760. Probably a little higher if you didn't miss any more than you thought you did.</p>
<p>what 740?
this is more extreme than the 2002 Nov curve.
xyzzy can you comment on this. thanks</p>
<p>I don't know, I guess a 740 would be the worst-case estimate (you got more wrong than you thought you did AND the curve is as bad as Nov 2002). </p>
<p>Personally I thought that yesterday's test was actually easier than the Nov 2002 test, but that might just be because I was very comfortable with the areas of chemistry that were covered yesterday, and one person's experiences have no bearing on the overall curve. Before the most recent CB book, the curve was...78-85 -> 800, right? If that's the norm, I wouldn't expect it to be too far from that -- probably not harsher than 80-85.</p>
<p>Hi guys,</p>
<p>Last question about the test:</p>
<p>Remeber that question where the answer was 2.5E-3? Was there only ONE choice with 2.5? Because somehow, I'm under the impression I selected 2.5E-4... </p>
<p>Much appreciated,
Thanks!</p>
<p>I was actually wondering about that too. I vaguely remember choice B being 2.5E-4, so now I'm thinking I might have somehow messed up with powers of 10. x_x</p>
<p>Since...k was definitely 1.0E-2, and the concentration of A was either 0.5 or 0.05, don't remember which. If it was 0.5, then the answer was definitely 2.5E-3. If it was 0.05, then it would be...2.5E-5, which I'm sure wasn't even a choice. There's no number ending with a 5 whose square is 2.5E-2.</p>
<p>i'm pretty sure that was the only choice: 2.5 E -3
so that might be what you picked!</p>
<p>EDIT: it was .5</p>
<p>Hmm, I hope so. Don't remember too well.</p>
<p>We'll all find out in a few weeks, anyway.</p>
<p>Who here thinks they have a chance at getting 800?</p>
<p><em>puts hands down</em></p>
<p>The answer to that question was choice "E"</p>
<p>Regarding the one with the lab equipment, I have a question about the seperation of sand and salt. I have it down to the funnel with paper and the water trough. If you just put sand and salt over the funnel with paper, it won't seperate unless you use water. The question didn't imply the use of water. Which one is the right answer?</p>
<p>I don't know which is correct, but I know I guessed in putting down the funnel with paper, so I hope it's the right choice. Honestly, I thought the water trough was used for one of the other ones, no?</p>
<p>-the water trough was used to separate the H2 and HCl since H2 wouldn't dissolve in water while HCl would
-i just assumed it was water, sand, and salt mixture (or else my world would have collapsed)</p>
<p>wow imagine how screwed we would be if a CB official ever saw this thread!</p>
<p>well there's been many times when one choice has been used twice. What I'm asking of anyone is did the funnel imply the use of water?</p>
<p>No, now that I think about it, I don't think it implied anything that wasn't clearly visible. So that would rule out water.</p>
<p>well what was the statement?
was it separating sand from a salt solution?</p>
<p>or was it just sand and salt?</p>
<p>if it just said sand and salt - and we took it to mean solid mixtures, then none of the apparatus given would separate the two components</p>