<p>I hope I got a 700+. It felt easier then October. =)</p>
<p>fastest rate of diffusion ?
H2?</p>
<p>I put H2 for the effusion rate one
.</p>
<p>yeah h2</p>
<p>I got 2 wrong so far, 0 unanswered</p>
<p>fastest rate of diffusion ?
H2? </p>
<p>yeah, H2 was the “smallest” out of all the choices so it zips around the fastest. (not a very chemistry intense explanation, but I’m 99% it’s correct)</p>
<p>do u rmbr the one with Al3+…i think it was asking what compound it would make?</p>
<p>or an alternative explanation to the “zipping around fastest” would just be grahams law of effusion</p>
<p>Does anyone remember the question with the endothermic rxn and they asked what you would do to increase the concentration of something on the right side of the equation? I think I screwed it up. ■■■.</p>
<p>i think i put “raise the temperature”</p>
<p>i put raise the temprature coz it was an endothermic reaction…so putting more heat means it would create more product</p>
<p>I agree with BonDuck, I think water is right. A sieve implies “no water,” and since sand can be the same particle size as KI, how would it be separated? What’s the size of the sieve? If sand and KI are the same size, KI wouldn’t be isolated at all. </p>
<p>On the other hand, with water, the KI would be dissolved and hence “separated” in a sense from the iron and sand. KI was chosen because you’re supposed to know it’s soluble–otherwise, a generic compound would be chosen. </p>
<p>And because I’m black, and we live in a society that is run by a black man, I’m right.</p>
<p>QED. Electric potential.</p>
<p>Does anyone remember the question where it asked which is an example of exothermic reaction?</p>
<p>and the choices were condensation, adding something to a dilute acid, etc…</p>
<p>and the one about how much Al reacts with excess sulfur?</p>
<p>powerbomb: are you sure it was asking for an exothermic reaction? somehow i recall a question asking which was an endothermic reaction…?</p>
<p>because i remember the choices being something like:
adding acid to water? something? (exothermic)
condensation (exothermic)
combustion (exothermic)
something (s) –> something (g) (endothermic)
something else</p>
<p>Yeah, the question was asking which was endothermic, and the answer was the one which had a solid as a reactant and gas as a product.
I think it was CO2(s) –> CO2(g).</p>
<p>Also, I only remember filling out 2-3 T/T/CEs…</p>
<p>yeah it was the one going from solid to gas</p>
<p>Where can I find a good raw score–> test score conversion for Chemistry?
I skipped 5 and estimate I got 5-8 wrong. My raw score should be 70-74.
What is the test score range for that?</p>
<p>Thanks in advance!</p>
<p>Solid to gas. I am sure of that. Did anyone else put raise the temperature for that Le Chatliers principle question? Cause I may have not screwed up then! I think I put 2 moles of Aluminum for the excess sulfur question.</p>
<p>I think the sparknotes and princeton review have accurate curves for this test. You could always check in the book the College Board sells too.</p>
<p>what about the T/F/CE with the adding water to sulfuric acid because the heat released would splatter?</p>
<p>so I guess the answer to that is T/T/CE</p>
<p>[Do</a> You Add Sulfuric Acid to Water or Water to Sulfuric Acid?](<a href=“http://chemistry.about.com/od/chemistrystudentfaqs/f/sulfuricwater.htm]Do”>Do You Add Sulfuric Acid to Water or Vice Versa?)</p>
<p>also, for a question that was</p>
<p>reactant1 + reactant2 -> product1 + product2 + heat</p>
<p>it was asking which of the following would increase the concentration (or perhaps amount?) of product 1? i put the choice that said add reactant1 and halve product2?</p>
<p>were those the correct answer choices?</p>