<p>Cool I’m sitting at -1.25 right now then. And the endothermic reaction was FT?</p>
<p>yes about endo TTCE question and yes to heat of sublimation (although I’ve never heard that term b4, it was the only one that made sense).</p>
<p>EDIT: Guys, the greenhouse gas one was T,T not CE right? We agree on that? I know that CO2 contributes to the greenhouse effect by trapping infrared rays in the earth’s atmosphere after they are converted from UV in sunlight and that’s how everything gets warmer. So, I put TT not CE</p>
<p>For the iron mesh one, I remember putting false, b/c I thought they rusted at the same rate, but the mesh exposes more surface area.
For the last one, I also put heat of sublimation. As for the NaCl, is it distillation or the other choice that was not used (can’t remember right now)
how many questions wrong can you get and still get 800?</p>
<p>probably like 2 or 3</p>
<p>the other choice that was not used was buret and flask and there’s no way to seperate NaCl using those…it was distillation w/o a doubt</p>
<p>anyone remember the answer to the question about the brittle solid? if it would be a metal, ionic cmpd, etc.
actually, nvm, i think they said the solid conducted electricity .. so it’s gotta be ionic.</p>
<p>There was one question with a solid that was a crystalline, brittle, and could conduct molten. Was that an ionic solid, or a metallic solid?</p>
<p>IONIC SOLID. Metals are not brittle lmao. Besides, it said the compound only conducted electricity after it was dissolved in water…that should REALLY give it away (electrolytes in water and nonconductive as a compound has to be ionic)</p>
<p>Does ne1 remember if, in the PbI2 problem there were twice as many moles of Pb as I-? I thought there were but I guess I must’ve made a math error.</p>
<p>probalby covalent network solid
i changed to metallic tho… but i think i’m wrong</p>
<p>so does an iron mesh sheet rust at the same rate as an iron block of the same mass?</p>
<p>no, it rusts faster because more surface area is exposed for rusting in the mesh at any given time</p>
<p>ionic solid-100% certain
iron mesh rusts faster because more oxygen can react with the larger surface area
there was the same amount of Pb and I, but the compound formed is PbI2 so the moles formed was something like 0.005</p>
<p>I thought it did</p>
<p>sooo i did pretty badly.</p>
<p>what would a rough estimate of around 71-73 outta 85 give you on the 800 scale? i can’t check any books like PR etc cos i don’t have any.</p>
<p>according to blue book
71 = 740
73 = 750</p>
<p>actually, I think I put that qhausqkqh, not sure though. Was there a decimal answer somewhere on the test with a 25 in it? Like .025 or .25 or something?</p>
<p>DankStarbursts, what’s the lowest out of 85 for an 800?</p>
<p>sorry, i don’t remember:S</p>
<p>it’s cool, I only remember it b/c of my paranoia regarding that question lol</p>
<p>82/85
10 chars.</p>