<p>For one T/F the CH4- was it F T?. Statement 1- Ch4 is square planar (its tetrahedral). And bond lengths are the same- T.</p>
<p>Was the last calculation molarity question .25 or .025 or something?</p>
<p>NO2 had the unpaired electron. You can tell because it has an odd number of electrons total (5 from N and 2(6) from O so 17 total meaning there has to be one unpaired one since bonds come in pairs). </p>
<p>Yep to the CH4 and yea I remember an answer being .25 or .025 though not the question.</p>
<p>Carbon Dioxide is bent. Diatomic gases are linear. I am almost sure of that.</p>
<p>Yep thats what I put down for both but the hess law with the CO2 formation was choice A rite? DH=DH1+DH2??</p>
<p>uh lol, no carbon dioxide is linear. Carbon makes a double bond with both oxygen atoms, which in turn each have 2 electron pairs. No outlying elections = linear shape.</p>
<p>Was the one with copper TT 1. Conducts electricity or sumthin 2. Forms covalent bonds (I had searched this on wiki but they described it vaguely so I thought it wud make sense since they are not ionic bonds but share a sea of electrons-or is it just metallic bond)</p>
<p>Yea about Hess' law and yea CO2 is linear</p>
<p>:O = C = O:</p>
<p>(Idk why it wont let me put spaces between the periods to get the two pairs on top on the oxygens but you get the point, just assume 2 more electrons on each oxygen.) </p>
<p>And yea it's metallic bonded. Totally different than covalent. Metallic bonds mean that the electrons are shared between every nucleus so its TF.</p>
<p>Which one is true? PH of .1 M HCL = 1?
Hess's law- was the answer A?
Which is least useful in titration? i said bunsen burner</p>
<p>yeah. PH of .1 M of HCl is 1 and I said bunsen burner too.</p>
<p>Shouldn't the liquid be in equilibrium with the gas, and so whenever any molecules have enough KE to leave, others revert back increasing KE of the liquid? Anyways, in an ideal insulated container no heat should be gained or lost, I put FT.</p>
<p>TF. Same avg. KE because temperature dictates this. Different average velocities because O2 is much more massive than Hydrogen gas. </p>
<p>I only got a couple of CE's... strangely I felt the T/F was easier than a couple other questions.</p>
<p>What were the other answers to the Molarity concentration ones and other calculations, such as the amount of Aluminum.</p>
<p>for one of the calculation problems--one that had to do with hydrogen and oxygen cooled into a liquid and then heated again...the problem never said hydrogen GAS so are we supposed to assume that they meant gasses and do our calculations in H2 and O2?</p>
<p>also-- one of the true/false questions said somethign about acetic acid being stronger than sulfuric and then it said soemthing about the hydrogen atoms...does anyone remember part two of the question?</p>
<p>i put false/true for that one...they asked if acetic acid has more hydrogen atoms than acetic acid.</p>
<p>Yes it was F/T. And how exactly were you supposed to do that Hydrogen 4 liter oxygen 3 liter one?. Whats the answer?</p>
<p>here's another one: what gas would be the least harmful in a small amount? CO2, H2S, etc.
there was one regarding partial pressure and argon, but I don't remember it. :S</p>
<p>CO2 is least harmful, the rest were like terrible rofl.</p>
<p>.9 was the partial pressures one.</p>
<p>For the 4 L hydrogen and 3 L oxygen, you just understand that that means that theres more hydrogen than oxygen and that particle wise hydrogen has 1/3 more. so since water is H2O, then 4 L of hydrogen combine with .5 x 4 = 2 L oxygen, so 1 L of oxygen is left.</p>
<p>I put CO2 for that question.</p>
<p>Anyone know which process separates sand and sugar? Is it filtration?</p>
<p>yeah, you soak it in water and then filter it.</p>