<p>What do you do with sig figs if the answer is 0?</p>
<p>@Chemcramyea No, I think they took it out</p>
<p>can someone explain why y in #36 of the collegeboard practice test is exothermic</p>
<p>@ChemCramyea The nernst equation is not on the test, for sure.</p>
<p>@persianpwr Y is forming bonds, so exothermic. and Z is changing from gas to solid, which is an exothermic process.</p>
<p>@10bio10 pm me your email so we can chat</p>
<p>What do you do with sig figs if the answer is 0?</p>
<p>@cramthyme I couldn’t tell you. I found the book helpful for the new curriculum but at this point I don’t know what is best</p>
<p>@cramthyme Isn’t it a reduction half rxn, so can i assume that all reductions are exo and all oxidations are endothermic</p>
<p>Can someone please answer me :(|)
What do you do with sig figs if the answer is 0?</p>
<p>@persianPwr its exothermic because think of it as forming bonds. Forming bonds release energy breaking bonds absorbs. 2 gases forming a solid is the creation of an ionic bond KCl, while Cl gaining an electron is forming a complete octet, or a full valence, which is bonding without another atom. As most atoms bond to complete their octet.</p>
<p>I’d treat it the same was as normal, so if you had 2 sig figs prior to getting 0 as an answer, make your answer 0.00</p>
<p>Tell me if i’m right: the forming of the bond is b/t cl and e-, therfore is my assumption my previous response correct</p>
<p><a href=“Live video chat rooms, simple and easy. - Tinychat”>Live video chat rooms, simple and easy. - Tinychat; to discuss about ap chem and tomorrow</p>
<p>I have a bad feeling about the new curve. I think they are going to make it like biology</p>
<p>What happened with the biology curve? Do you need to do better to get a 5?</p>
<p>Only 5% got a 5 last year as opposed to 20% in the years prior</p>
<p>Has anyone taken the Barron’s online practice test? Could you explain this question?</p>
<p>“Which of the following best explains the difference in ionization energy between H and He?”</p>
<p>A) He has two electrons and H has one
B) He has an electron in a different shell
C) He has an additional neutron
D) He has an additional proton.</p>
<p>It should be D because He will thus have a higher nuclear charge so there will be a greater force on the electrons in the He atom. Thus it will be harder to pull it out</p>
<p>@cramthyme since he has more protons, it has a higher effectice nuclear, thus needing more ionization energy to removve the electron</p>