June 2008 - Chemistry

<p>what was it?</p>

<p>um, anyone remember what they got for the one where it was water(l)'s mass versus volume?
i answered the one that looks like y=sqrt(x)
or would it have just been one that looks like y=x
arg i feel so stupid now</p>

<p>ya that was obvious
2g/(2g/mole bcuz of H2).. = 1 mole H2... since N2 is excess, you do
(1mole H2) (2mole NH3/3mole H2), so its 2/3 moles NH3 which is .67</p>

<p>i think that one was a straight increasing line just like Pressure vs T.</p>

<p>density=m/v If m increases then v has to increase as well.</p>

<p>GuitarRckr: There were 2-3 questions on Bronsted-Lowry acids/bases, I believe. I remember one was "Which one of these is a B-L acid?" and I think there was only one with an H+ in it anyway...</p>

<p>Also, just checking: For one of the oxidation ones, the one with Pb and PbSO4, etc, the one that oxidized was Pb, not the Pb+polyatomic ion also on the left side of the equation, correct?</p>

<p>^ yes, it was Pb, for the Bronsted Lowry one, there were 2 questions, one said "which makes Lowry bases acidic" i chose H+, the other said which of the following is(nt?) a Lowry Base" and the choices were NH3 etc, i dont remember whether it said is or isnt, but i need clarification on that one too. btw, invite me on aim, my sn is istriveagain</p>

<p>I think the answer to which one is not a lewis acid is CCl4</p>

<p>What did you guys put for the margin of error question? (the uncertainty thing?)</p>

<p>does any1 remember the question where they gave 3 molecules and aksed to put them in increasing order of ionic bonds or structure? </p>

<p>The molecules were KO,FCl,N2 this question was in the 60s</p>

<p>I pick choice A which was KO>FCL>N2 </p>

<p>any remember this?</p>

<p>for the unceartinity i put down choice A, 7.5 ml + or - 0.2</p>

<p>rjacob- i put that as well for increasing ionic bonds (why are my replies showing on top of the original post?)
Kscnoko- general consensus deems it A. i did it backwards, so i didnt get that. lol</p>

<p>I agree with you.</p>

<p>Guys, for the linear/nonpolar True or false question, isnt it TF because a diatomic molecule CANNOT be linear; think about it...O-O <---it cant be linear because it needs at least 3 atoms to make a bond angle.</p>

<p>Yeah, KO>FCl>N2. Ionic>covalent>dispersion, right?</p>

<p>..... Actually all diatomic molecules are linear.</p>

<p>two points define a line. my honors chem class had a troublesome time absorbing this.</p>

<p>yes^
10char</p>

<p>Hehe are you sure about that? I clearly remember my chem teacher saying that if you have 2 atoms they don't make any angle... I mean think about it. It's like in math - if you have 1 line, you can't make an angle, you need 3 points (or 2 lines) to make an angle
hmm also wikipedia doesn't say anytin about linear it says AX1E 0.o...do you have a link to prove that it is linear?</p>

<p>Hehe are you sure about that? I clearly remember my chem teacher saying that if you have 2 atoms they don't make any angle... I mean think about it. It's like in math - if you have 1 line, you can't make an angle, you need 3 points (or 2 lines) to make an angle
hmm also wikipedia doesn't say anytin about linear it says AX1E 0.o...do you have a link to prove that it is linear?</p>

<p>It is. Why don't you research yourself? If you think it is true then find a proof for it.</p>

<p>As for our proof, VSEPR</a> theory - Wikipedia, the free encyclopedia</p>

<p>AX1En Diatomic HF, O =Linear</p>

<p>koken911- i have a feeling you are quite unattractive (physically and otherwise). sorry if that offends you</p>

<p>The diatomic question is TT. All diatomic molecules are linear.</p>

<p>2 points = 180 degrees apart = linear.</p>