<p>X2 means the same two elements. such as H2 or Cl2. HCl would be XY.</p>
<p>@GreedisGood</p>
<p>yeah, there were quite a couple CE’s</p>
<p>“Diatomic” implies one of the seven diatomic molecules, all of which are nonpolar.</p>
<p>Yea I know, but the reason it is nonpolar is because the electronegativities are the same, not because it is linear.</p>
<p>I think “diatomic” refers to any molecule with 2 atoms, regardless of whether or not the atoms are the same. In that case, the CE should not be filled in.</p>
<p>what did you guys put for the questions asking about instruments? there was one about accurately mixing NaCl with water to achieve 1.000M, and another about uncertainty. I think I but buret for the first and graduated cylinder for the second</p>
<p>Also, what was the molar mass of M? 7?</p>
<p>Let me add to this discussion:</p>
<p>The question was (to the best of my knowledge):</p>
<p>a. The diatomic molecule X2 is nonpolar
b. X2 has a linear molecular shape</p>
<p>I did not believe this was sufficient correlation for CE</p>
<p>the pipet thingy mabobber was the most precise.</p>
<p>For the thing with the most uncertainty, I forget what I put, but all the options had like mL, or cm (not SI units), so they were very precise. I just used process of elimination to find the correct answer.</p>
<p>yea i had 7 for the molar mass of M3N (this was probably the hardest question).</p>
<p>Here is a picture of the most accurate instrument:</p>
<p>[Amazon.com:</a> 10ML VOLUMETRIC PIPET: Industrial & Scientific](<a href=“http://www.amazon.com/VEEGEE-10ML-VOLUMETRIC-PIPET/dp/B001D72BLA]Amazon.com:”>http://www.amazon.com/VEEGEE-10ML-VOLUMETRIC-PIPET/dp/B001D72BLA)</p>
<p>no. diatomic always refers to two of the same elements. anyway all diatomic are linear and so there is a syymetrical distribution of charge and so its np/</p>
<p>it would be a volumetric flask for the NaCl. My chem teacher went over this the day before the AP and you put the solid in the flask and the fill it up with water.</p>
<p>x2 means x bonded with x. same element bonded with same element. so CE is applicable.</p>
<p>for the molar mass problem for M3N, anybody remember what the problem was specifically?</p>
<p>for every .42 grams of M there are .28 grams of N and M3N had some amount of mass</p>
<p>oh yeah that was 7.</p>
<p>[Diatomic</a> molecule - Wikipedia, the free encyclopedia](<a href=“http://en.wikipedia.org/wiki/Diatomic_molecule]Diatomic”>Diatomic molecule - Wikipedia)</p>
<p>Diatomic molecules are molecules composed only of two atoms, of either the same or different chemical elements. The prefix di- means two in Greek. Common diatomic molecules are hydrogen (H2), nitrogen (N2), oxygen (O2), and carbon monoxide (CO).</p>
<p>this sucks lol</p>
<p>[Volumetric</a> flask - Wikipedia, the free encyclopedia](<a href=“http://en.wikipedia.org/wiki/Volumetric_flask]Volumetric”>Volumetric flask - Wikipedia)
Its used to make solutions :P</p>
<p>so this test was relatively easy? you guys think the curve for 800 will be -4? or more… or less?</p>
<p>what did you put for the question in the true false section with the diagram of the HCl in the beaker with the lightbulb and battery coming out of it?</p>