<p>add hcl. pbcl2 is insoluble in aqueous solution</p>
<p>(B)</p>
<p>thnaks guies for the help</p>
<p>23.</p>
<p>Step 1: Ce4+ + Mn2+ ---> Ce3+ + Mn3+</p>
<p>Step 2: Ce4+ + Mn3+ ---> Ce3+ + Mn4+</p>
<p>Step 3: Mn4+ + Tl+ ---> Tl3+ + Mn2+</p>
<p>The proposed steps for a catalyzed reaction between Ce4+ and Tl+ are represented above. The products of the overall catalyzed reaction are</p>
<pre><code>(A) Ce4+ and Tl+
(B) Ce3+ and Tl3+
(C) Ce3+ and Mn3+
(D) Ce3+ and Mn4+
(E) Tl3+ and Mn2+
</code></pre>
<p>B)</p>
<p>cancel out everything that is on both sides of the equation (The Mn+3, Mn+4, and Mn+2)</p>
<p>then you see that you're left w/
2Ce+4 + Tl+ --> Tl+3 + 2Ce+3</p>
<ol>
<li><p>In which of the following compounds is the mass ratio of chromium to oxygen closest to 1.62 to 1.00 ?</p>
<p>(A) CrO3
(B) CrO2
(C) CrO
(D) Cr2O
(E) Cr2O3</p></li>
</ol>
<p>B...</p>
<p>(1.62)/1 = 1.62
(52)/(16*2) = 1.625</p>
<p>how hard is the MC part of the test...is it very hard to finish in time...b/c we never took a timed practice in my class but we have gone through a couple of tests....</p>
<p>if a glowing splint was put into seperate containers containing oxygen (container A); hydrogen (container B); and nitrogen (container C)
what would be the expected result?</p>
<p>Oxygen: splint would reignite
Hydrogen: create a "popping" sound
Nitrogent: the splint would go out</p>
<p>I thought the MC was not rushed at all, but I didnt do too well. The key is, if you dont know it, dont guess.</p>
<p>Yay....alright!
Thanks!
any new questions....</p>
<p>What principle states that no more than 2 electrons can occupy one orbital?</p>
<p>to how many decimal do i have to round???????????</p>
<p>electron pair repulsion
what's Pauli Exclusion Principal...ive forgotten...</p>
<p>pauli exclusion: no two electrons have the same n,l,ml,ms
can anyone answer my question on Sig figures?</p>
<p>round to however many significant figures there are (i.e. numbers not zero...unless there is a decimal behind the zero like 230. or if it comes at the end of a decimal like .230 but ones that are in front of a decimal but have nothing in front of them 0.230 are not significant...)
got that :)</p>
<p>thats what i thought (Pauli...) hope the sig fig stuff is clear...if not tell me...</p>
<p>so if we memorize these labs, were guaranteed a 100% on the lab portion of the FRQ?</p>
<p>so i round it after each calculations instead of waiting till to get the answer and rounding it???
wat about logs? say -log(.02)= 2.3242 do i just do 2?</p>
<p>i don't think there really any specific lab questions,</p>
<p>but to answer your question, no that wouldn't guarantee you 100%</p>