<p>I really don't think we're allowed to talk about these collegefreak... </p>
<p>Overall, i think it was more difficult than usual. Hope the curve is 5-6 wrong this time for a 800.</p>
<p>The VERY last problem gave the reaction of the Haber Bosch process and asked how many moles of NH3 were formed when there were 2 g. of H2 and exccess N2.</p>
<p>N2(g) + 3H2(g) → 2NH3</p>
<p>i got 0.67 mole of NH3</p>
<p>All of the previous exams were discussed and i think the mods already know about this, because they are on top of things.</p>
<p>^^Same here</p>
<p>i remember a .67 mole also.
um also 7.0 g/mol for metal M</p>
<p>Is lead used twice in the classification questions?</p>
<p>What about the question with the light-bulb, battery, and HCl? Was that T/T/CE?</p>
<p>Light bulb was TT CE becuz HCL is a strong electrolyte</p>
<p>yes, the battery HCL on was TTCE. the margin of error i put the third one, i remember hand-calculating each one and it was not pleasant</p>
<p>Does anyone remember what 115. said exactly about argon?</p>
<p>I think the margin of error has to do with percentage.</p>
<p>Yeah, I got (A) for the margin-of-error question, but I don't recall what the object was.</p>
<p>i only remeber lead as an answer in the bromine/chlorine/lead classification question int he beginning</p>
<p>For that margin of error i chose A, because it was 7.5 ml and plus or minus .2</p>
<p>This has the biggest error since the ratio of 0.2:7.5 was greater than all of the others. Any1 else pick this?</p>
<p>yeah, it did. thats where the calculations came in</p>
<p>Isn't the margin asking for the biggest margin of error?</p>
<p>this test felt easier than the practice tests...but i didnt finish in time, although i could have gotten through all of them given that i had ~5 more min! lol</p>
<p>i had the one with the smallest measurement and the biggest uncertainty.</p>
<p>I think van_sant meant choice A. It was the biggest error, atleast when i did the calculations.</p>
<p>yep first one</p>