<p>I found out that I got a 770 in May... hmm. Is that okay on the curve? I know a 770 in Chinese or Math II is disastrous because of the ridiculous curve... but I don't know what the Chem one is. Should I retake?</p>
<p>actually, r can be 8.31 if you are calculating in terms of pascals instead of atms
just how to convert atm/pascal/torr
and btw, since someone mentioned this,
PR practice test 3 was death
PR practice test 2 was not as death
^2005-2006 edition</p>
<p>how do those tests compare to the real thing?</p>
<p>"on the real sat 2 chem test I don't understand the second question about the vapor pressure of the isopropanol... it says the answer is 35 but I thought it was supposed to be 760+35... if someone knows what question im talking about please reply."</p>
<p>same question here...</p>
<p>also anyone know the fill in the black one? (5-9)</p>
<p>and what does the graph look like for the relationship between volume and pressure of a gas?</p>
<p>i've looked in three books and it's either one answer or another...</p>
<p>btw is H2O2 peroxide?</p>
<p>^At a constant temperature, pressure and volume are inversely related. The image on the left is a graph of the relationship:
<a href="http://cwx.prenhall.com/bookbind/pubbooks/blb/chapter10/medialib/blb1003/bl10fg07.jpg%5B/url%5D">http://cwx.prenhall.com/bookbind/pubbooks/blb/chapter10/medialib/blb1003/bl10fg07.jpg</a></p>
<p>H2O2 is hydrogen peroxide.</p>
<p>how do u find empherical formulas when they give moles?</p>
<p>if they give moles of the reactants... u gotta convert it to grams of a product (be consistent if u have to pick)... then take the lowest amount and divide that into each value. this gives a whole number ratio. </p>
<p>Ex: three numbers after u convert are like .442, .884, and .442.
The smallest is .442 so divide and the small number u put into the formula. so it would be like 1 atom A, 2 atoms B, and 1 atom C.</p>
<p>AHHHH tomrrw</p>