CHEMISTRY COMMUNITY

Michelle Dela Rosa 1D

It cannot be 1,2-dichlorocyclohexene because of the double bond. Naming it that way would actually result in an incorrect name of 1,2-dichlorohex-2-ene.

Michelle Dela Rosa 1D

The detailed midterm solutions are posted on the Chem14B class website

Michelle Dela Rosa 1D

Carbon dioxide is an electrophile. If you draw out the Lewis structure for CO2, you can see that carbon is central and is bound to two oxygen atoms. The electronegativity of oxygen gives carbon a partial positive charge, making carbon dioxide an electrophile (Carbon is electron deficient).

Michelle Dela Rosa 1D

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Michelle Dela Rosa 1D

When will the midterm solutions be available?

Michelle Dela Rosa 1D

Michelle Dela Rosa 1D

Also, with regard to density, it is an intensive property since it is independent of the amount/size of the material/sample. Density is mass (extensive property) divided by volume (extensive property). An extensive property divided by an extensive property is an intensive property. State properties ...

Michelle Dela Rosa 1D

Standard reduction potential is an intensive property. You might multiply a half reaction by 2 to balance the electrons, but the standard reduction potential is constant and does not need to be multiplied by 2 (unlike bond enthalpies).

Michelle Dela Rosa 1D

Are oxidation state and oxidation number interchangeable terms, or is there any difference between them?

Michelle Dela Rosa 1D

You pick them up at 4006 Young Hall. Finals should be available this week, but I'm not sure what their hours are, sorry.

Michelle Dela Rosa 1D

I think we have to know that a reversible process is a system at equilibrium (infinitely small changes in a variable can reverse the process) and that maximum work is achieved in a reversible process.

Michelle Dela Rosa 1D

Just out of curiosity, how high does the temperature have to be to use the equipartition theorem in calculations of vibrational motion? Thank you in advance!

Michelle Dela Rosa 1D

Are we only allowed to use the Henderson-Hasselbach equation for questions involving buffers, thereby using (R)ICE boxes for every other calculation of pH?

Michelle Dela Rosa 1D

On Question 3b of the midterm, the question asks for the energy required to remove the electron from the metal surface. I calculated the work function (energy of the photon - kinetic energy of the electron). Why is the answer (1.66 x 10^-17 J) equivalent to only the energy of the photon if informati...

Michelle Dela Rosa 1D

When calculating Kp, does it matter whether we use atm or bar? In the Fall 2014 Quiz 3 Preparation Q8, I understand that the answer should be given in atm since that is the unit provided in the question, but for Q10, is the answer in atm because we use the ideal gas law? Also regarding Q10, why do t...

Michelle Dela Rosa 1D

If the ligand is polydentate, you use the prefixes bis-, tris-, tetrakis-, pentakis, etc. Oxalate is a bidentate ligand; therefore, you use bisoxalato, not dioxalato.

Michelle Dela Rosa 1D

Yes, if a ligand is polydentate and there is more than one in a coordination compound, you use the prefixes bis-, tris-, tetrakis-, pentakis-, etc.

Michelle Dela Rosa 1D

I think you can write aqua as either H2O or OH2 when naming coordination compounds. Some people write aqua as OH2 to emphasize the order of bonding since oxygen (not hydrogen) is the one binding to other elements, but writing H2O shouldn't be wrong either.

Michelle Dela Rosa 1D

You would draw (CH3)2Be as a linear molecule. Beryllium would be your central atom, and it forms two bonds, one to each Carbon of the CH3. Each Carbon is thus bonded to Beryllium and to 3 hydrogens so it achieves octet. There are a total of 16 valence electrons ( C: 4*2=8, Be:2, H: 1*6=6.......... 8...

Michelle Dela Rosa 1D

I think you would use one significant digit because that is the least precise measurement given in the question. In general, I believe you evaluate the number of significant figures before you convert units accordingly so I would decide based on the numbers provided in the problem. The answer using ...

Michelle Dela Rosa 1D

Silver is in the same group as Copper, which is an exception to the Aufbau Principle (the building-up principle), the other being Chromium. In these two cases, half full d^5 and full d^10 subshells have lower energy. For Chromium, the electron configuration would be [Ar] 3d^5 4s^1 instead of [Ar] 3d...

Michelle Dela Rosa 1D

The purpose of using significant figures is to make sure that the answer you calculated isn't more precise than the number(s) you started with. If one rounds off numbers too soon, errors in calculations may occur, and significant margins of error can affect data collection. Also, the number of signi...

Michelle Dela Rosa 1D

What do you call Iron blowing in the wind?

Febreeze

Michelle Dela Rosa 1D

If there is a multistep problem, do we maintain four significant figures per step, even for the following step? For example, if part A requires an answer with only four significant figures (example: 1.178), and part B uses that answer to solve for another variable, should we use 1.178 or the extende...

Michelle Dela Rosa 1D

Doing all the reading before jumping into the practice problems does take some time, but even though there's no way to truly check if we use the textbook chapters as a resource, I think that reading the assigned chapters could only help us understand the conceptual side of the course material more f...

CHEMISTRY COMMUNITY

Search found 25 matches

Re: Numbering

Re: Detailed Midterm Solutions

Re: Is CO2 a nucleophile or electrophile?

Re: Chemistry Jokes

Re: Midterm distribution

Re: Chemistry Jokes

Re: Standard Reduction Potential as Intensive Property

Re: Standard Reduction Potential as Intensive Property

Oxidation state

Re: Picking up the final

Re: Reversible and Irreversible

Equipartition theorem

Henderson-Hasselbach equation

equations for the photoelectric effect

When to use atm or bar

Re: Bisoxalato vs. Dioxalato

Re: Polydentate Ligands

Re: Naming Coordination Compounds

Re: Lewis Sturcture of (CH3)2Be

Re: How many significant figures does this question require?

Re: Aufbau Princple

Re: All students read this sig fig post [ENDORSED]

Re: Chemistry Jokes

Re: All students read this sig fig post [ENDORSED]

Re: Homework