<p>“The simplest organic compounds are hydrocarbons, compounds that contain only carbon and hydrogen.” - quote from PR</p>
<p>Hydrocarbons with functional groups take different names.</p>
<p>Impure hydrocarbons aren’t actually hydrocarbons haha by the way.</p>
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<p>The solubility of KCl varies with temperature. If you create a saturated solution of KCl at a specific temperature and then lower the temperature, KCl will precipitate out of the solution.</p>
<p>And yes, there is no such thing as an impure hydrocarbon.</p>
<p>[Hydrocarbon</a> - Wikipedia, the free encyclopedia](<a href=“http://en.wikipedia.org/wiki/Hydrocarbon]Hydrocarbon”>Hydrocarbon - Wikipedia)</p>
<p>from your wikipedia link…</p>
<p>are referred to as “impure”, and remain somewhat erroneously referred to as hydrocarbons.</p>
<p>hydrocarbon is an organic compound consisting entirely of hydrogen and carbon</p>
<p>Somewhat erroneously referred to…another semi-ambiguous question by the college board.</p>
<p>sigh, i just missed one so far =/
left none blank</p>
<p>I cant believe I totally forgot about the acid/water thing! I thought I checked that problem, so I ended up putting the fire one! -_- stupid me!</p>
<p>ya for the kCl it was exthermic crystillazation dats wat i put</p>
<p>one of the density questions was 1.011 or something</p>
<p>I’m pretty sure the density was 1.00 using sig figs.</p>
<p>it was 20.451 - 10.0123 something divided by 11 and it came out to be 1.011</p>
<p>what? but they never said to round it or use significant figures there was a choice whre the exact answer was 1.011</p>
<p>there was another question on a pressuer to volume ration and the answer was either 0.48 or 0.3 anyone remember</p>
<p>It was 1.00 since the answer came out to 1.0011, and sigfigs are part of the test. It’s the first chapter in the Barron’s Book</p>
<p>significant figures are always part of the test. Does anyone know if the SATs use the Chemistry olympiad format for significant figures? It’s different.</p>
<p>but 1.0011 or whatever was a choice</p>
<p>there was some other questionon pressure and volume where i think the answer was 0.48 and another abouth enthalpy or something</p>
<p>what about that question about the atom and the quanta/enough energy for ionization
what was that answer?</p>
<p>it was in discrete amounts called quanta</p>
<p>Yeah I got .48 for that question, pretty sure its right. </p>
<p>Anyone remember the question: Which would have the same effect on the solution as NH3 or whatever, I think I put KOH because it was the only base there. Anyone remember this question.</p>
<p>Edit: For the pH of 6, is the hydrogen ion concentration was it 10^-6? I forgot what the question was, but the choices were like 6M, 8M, 10^-6M, 10^-8M, 10^6M.</p>
<p>I also put KOH, but I’m not sure.</p>
<p>.48 for what question? I don’t remember getting .48 for anything =/</p>