CHEMISTRY COMMUNITY

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The final has to be in pen, at least that is what will be graded. I'm pretty sure you can use pencil to work out some problems though but you have to remember to trace it in pen in order to get credit.

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if the ligands are on opposite sides, then it is considered trans. if the ligands are on the same side, then it is considered cis.

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The solutions manual says that the general equation for determining the oxidation number of metal in a complex ion is:
(the # metal atoms)(oxidation number of the metal)+(# each ligand)(charge of each ligand)=charge of the ion

305008749

I'm not sure about bases but I think B-L acids mean a substance must contain/donate H+ to be an acid while Lewis acids mean all the substances that can accept an electron pair form a lewis base are known as acids.

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He mentioned in lecture that the topics would be covered equally.

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Yes. The electronegativity trend is that it increases as it goes up and to the right on a periodic table.

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The solutions manual says 109.5 so I'm assuming the double bond doesn't affect it?

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It should cover everything from after the midterm until now, so from Lewis Structures to Hybridization.

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The electronegativity difference between H and Br atoms is not that large and the atoms in the molecules are not dependent on associated charges to stabilize one another.

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We don't have to worry about that for 14A I believe.

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No lecture on Wednesday! He confirmed it on Friday.

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As long as it shows the 180 degree bond then it should not matter whether it is horizontal or vertical.

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It is week 9 in section, right after Thanksgiving break.

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This may be the wrong wording but I think because the lone pairs are more.. free? That's what makes them more negative, therefore having a strong repulsion which is why they have to be separated as far away from each other. Where they are then placed will affect the bonds near them which will cause ...

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Since resonance structures show a molecule's overall stability, I think it is most relevant when determining where the molecule might be more electron rich or poor, eventually leading into figuring out its molecular shape.

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Salts are able to dissolve in water so you know it has ionic bonds. I'm not necessarily sure about molecules alone, but I think it may safe to assume that it is a molecule if it does NOT dissolve in water, and of course has covalent bonds.

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From what I've heard you're supposed to turn it in week 9. So you turn in 14 problems total, 7 from week 8 and 7 from week 9.

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The trends of electron affinity in the periodic table are that electron affinity increases as it goes up the groups and across the periods from left to right. This happens because electrons added to energy levels get closer to the nucleus so there is a stronger attraction between the nucleus and its...

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From my understanding, "degenerate" refers to "same energy" or "of equal energy" so if it is talking about degenerate orbitals, it means that they have the same energy.

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this link has about 27 practice problems along with the answers in the bottom of the page! http://myweb.astate.edu/mdraganj/LewisDot.html

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My TA said that the cut off is Sunday night, 3 points each week, but the professor will not count and give you the points until the end of the quarter.

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According to the solutions manual, "the electrical field corresponds to the amplitude; as the frequency decreases, the waves broaden and the extent of the change (the slope of the wave) decreases." I hope this helps!

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I am pretty sure you can use a lowercase l. I do that as well because it can be quite confusing. I'm not exactly sure how to explain what ml is but from what I understand, it just tells you the subshell's (which is determined by l) orbitals orientation. So in the example he gave us, if the subshell ...

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That's true. On Friday he mentioned that all the material from after the last test up until Friday's lecture will be on Test 2.

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Yes, we should be receiving the same paper for midterms and finals. The only thing that's a bit confusing is whether to use the molar mass from the paper or the textbook because as I'm doing homework, I'm starting to memorize the ones from the textbook instead. I don't know if that will mess up my a...

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when you guys say sig figs aren't affected by constants, does that mean we will still get the right answer if we use them or to not use it? In other words we should just ignore the constants and go based off the variables given to us?

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From my understanding, threshold energy is the minimum amount of energy that is needed for a reaction to take place, so in this case the "reaction" is removing electrons.

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That makes sense, thanks!

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My TA said to not round the atomic masses given on the periodic table, just use them as is. One of the few times that it's safe to round, is when you are trying to find the empirical formula for a compound because that's when you really want the whole numbers.

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I'm having trouble understanding what is the difference between molecular weight and molar mass. Aren't they basically the same thing?

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yes, I believe that is correct.

CHEMISTRY COMMUNITY

Search found 31 matches

Re: Can We Take The Final In Pencil?

Re: Difference between cis and trans

Re: 9C.1 7th edition

Re: Lewis vs Bronsted

Re: Final

Re: Trend of Electronegativity

Re: Bond Angles in 7E 2E.13.b

Re: Test 3

Re: Question about what makes something ionic

Re: Drawing structures

Re: Thanksgiving Wednesday Class

Re: 7th edition 2E.13

Re: Test

Re: Lone Pairs

Re: Bond Length

Re: Salts and Molecules

Re: Turning in Homework (Thanksgiving Break)

Re: Trends in the periodic table

Re: Degeneracy

Re: Good practice options for lewis structures?

Re: How does grading for discussion posts work?

Re: Problem 1A.3

Re: ml

Re: Test #2

Re: Equations

Re: Should Significant Figures be affected by constants?

Re: Threshold energy [ENDORSED]

Re: Molecular weight vs molar mass

Re: formula units [ENDORSED]

Molecular weight vs molar mass

Re: Molar Masses