<p>^i put F for the first part. dont remember the rest</p>
<p>and also the question about sugar dissolving in water. which of the properties was not changed? i remember eliminating vapor pressure and freezing/boiling point, forgot the other 2 choices</p>
<p>Conductivity.</p>
<p>for the question that was 2.75, what was the question…i’m not sure i got that remember that one. and for the unstable one, what were the choices?</p>
<p>@schfinx ahh yes i think i put that
what would a -2 to 4 w/ 0 ommited be? like a raw score from 80-83? would that still be 800, even though not that many people took the chem test this time around?</p>
<p>@collegeislife
I think the 2.75 was calculating number of moles produced from a reaction…or the resulting molarity after mixing 2 basic solutions
and the unstable Pb compound was PbO, PbO2, PbS, PBBr2, PbBr3
I looked at the choices and noticed that PB must have similar bonding properties as carbon</p>
<p>WAit a minute, my teacher always told me to read at he miniscs and I’m sure it was between 3 and 4, so it should have been 3.38</p>
<p>Diboy,
I believe you are correct.</p>
<p>@Icedcoffee: Density changed. The colligative properties (answers C, D, and E) are all related to each other; if one stays constant, all of the other properties will stay constant. Likewise, if one value is changed, all the other properties will change as well.</p>
<p>^I think the question asked for the value that would NOT be changed. so as you said, density, like the 3 colligative properties of boiling point elevation, freezing point depression, and vapor pressure, would change. so conductivity remains the same (0 or little conductvity)</p>
<p>@super - it was asking which did not change. The answer was conductivity because sugar water and water both do not conduct electricity.</p>
<p>@Icedcoffeee and oblivi0n: I said that Density changed, and C, D, and E all had to stay either constant or change. Which means that the only possible answer is A. I think you misunderstood what I said there.</p>
<p>This is how I solved it since I no one told me that sugar water do not conduct electricity.</p>
<p>ahh ok
although i remember on mine, conducitivity was like b or c
i dont remember it being A…maybe different test forms</p>
<p>Do any of you remember which question number the PbBr3 question was?</p>
<p>^i beleive it was one of the last ones
either 69 or 70
though i think 69 was the one w/ the SI units</p>
<p>Oh my god lol. I was wondering why I didn’t remember any question with Pb in it. Turns out I didn’t even realize that there was a number 69 or 70. Wonderful.</p>
<p>uh oh. what number did you stop at?</p>
<p>The page where you had to calculate the molarity after combining two solutions and the answer was 2.75. Half the page was empty so I just assumed that was the last page. I hope that was close to number 70</p>
<p>hm that was around 50 or 60 i think…</p>
<p>It was definitely in the 60s. I remember that much. I just don’t remember if the last question on that page was number 64 or number 67</p>