CHEMISTRY COMMUNITY

Abigail_Low_1A

When naming an organic compound, which has priority for the lowest number? Is it function groups, double/triple bonds, and then substituents?

Abigail_Low_1A

Does the orientation of the chair conformation matter? For example in hw questions 3.15 & 3.16, does it matter which orientation the chair conformation is as long as I have the largest atoms/molecules in the equatorial position?

Abigail_Low_1A

The book says the "largest" is more stable in the equatorial position, so I would say size. However, I'm confused about 3.16 because it doesn't state whether the conformation is more stable when methyl is equatorial or not. I'm assuming it's more stable when it is equatorial, because CH3 ...

Abigail_Low_1A

On quiz problems that say 25C, I've always thought the final answer should have 2 sig figs. I have seen some discrepancies and wanted some clarification.

Abigail_Low_1A

Dr. Lavelle, Thank you so much for putting your students before yourself, despite some hard times. Throughout Chem 14A and 14B, there have been times where I have really struggled to grasp the material. However, your many resources helped me to strengthen my understanding and allowed me to do well i...

Abigail_Low_1A

In the textbook it says "when the structure has more than two substituents, the lowest numbering on the first occurrence of a substituent gives the correct IUPAC name." Do you alphabetize the substituents first and then decide on how to number the structure?

Abigail_Low_1A

Two chemists go into a restaurant.
The first one says "I think I'll have an H2O."
The second one says "I think I'll have an H2O too" -- and he died.

Abigail_Low_1A

Diana_Anum1G wrote:I know that quiz 2 covers up to page 73 in the course reader, but where does it cover up to in the homework problems? Is it up to 15.55 because 61 starts talking about activation energy?

Yes, I think so. That's where I stopped.

Abigail_Low_1A

You only do E(cathode)-E(anode) if the values given are standard reduction potentials. If the half reactions given are reduction reactions (with electrons on the reactant side), then the E values given with it are reduction potentials. However, the E value given for the anode is for the oxidation re...

Abigail_Low_1A

How do you know when to use an inert electrode and what kind to use?

Abigail_Low_1A

Is delta U = 0 in an isothermal system? If so, why?

Abigail_Low_1A

How come calculating for standard free energy using standard free energy of formation will not give the same answer as using enthalpy, temperature, and entropy? If a questions on the quiz asks to calculate standard free energy and both methods are possible, will one answer be considered incorrect?

Abigail_Low_1A

What kind of bear can dissolve in water? A polar bear!

Abigail_Low_1A

8.9 An ideal gas in a cylinder was placed in a heater and gained 5.50kJ of energy as heat. If the cylinder increased in volume from 345 mL to 1846 mL against an atmospheric pressure of 750 Torr during the process, what is the change in internal energy of the gas in the cylinder? The solution manual ...

Abigail_Low_1A

What acids and bases should we know for the final? Is there a specific list either in the course reader or the textbook that we should study?

Abigail_Low_1A

A hydrogen atom and a neutron are walking down the street.
The hydrogen says, "Wait, I dropped an electron, help me look for it."
The neutron says "Are you sure?"
The hydrogen replies "I'm positive."

Abigail_Low_1A

A photon checks into a hotel, the front desk asks him, "do you need any help with your luggage?"

He said, "No thanks! I'm traveling light!"

Abigail_Low_1A

Jennifer_Wong_1G wrote:From what I understand, in the coordination complex you name the ligands first (alphabetized), and then you name the metal atom or ion.

I was referring to the chemical formula haha, but thank you!

Abigail_Low_1A

Is there a specific order to follow for writing the chemical formula for a coordination complex (except for writing the TM before the ligands)? Do the ligands have to be alphabetized?

For example, when given pentaaminebromocolbalt (III), are [Co(NH3)5Br]2+ and [CoBr(NH3)5]2+ both correct?

Abigail_Low_1A

Can I assume that the longer the bond length, the higher the bond order because bond order corresponds to the number of bonds?

Abigail_Low_1A

what do you call a clown who's in jail?
A silicon!

Abigail_Low_1A

Are you referring to it's bonding to other atoms? If so, which? If you are referring to the bond between C and N, that bond is covalent since the difference in electronegativity is only 0.5. Furthermore, there is a triple bond between C and N so the bond between them is actually pretty strong. CN- ...

Abigail_Low_1A

Hi! How do you know which Lewis structure would make the most contribution to a resonance hybrid? Is it based on formal charge? Thanks!

Abigail_Low_1A

Electrons are removed from the outermost orbital, so I just identified the outermost orbital for each element :)

Abigail_Low_1A

#29a says n=2, l=1! I think you just read the wrong question or something haha

Abigail_Low_1A

Hi! I'm a little confused on the difference between resonance and resonance hybrid. Is resonance just the property of having more than one lewis structure and the resonance hybrid is the actual representation of the molecule, which is a blend of all the possible lewis structures? Thanks in advance!

Abigail_Low_1A

For your first equation, I would personally recommend sticking with E=h(frequency) just because it's more simple and less number crunching. But of course, you would have to decide which equation to use depending on the kind of information given in your problem. And I don't think there is a better va...

Abigail_Low_1A

Yes, the energy of the photon emitted is equivalent to the amount of energy absorbed to excite the electron. The change in energy level (ex. n=1 to n=2 or vice versa) is not equal to the amount of energy of the incoming photon or the energy difference between levels. The change in energy level is ju...

Abigail_Low_1A

1) You're not looking for the molar mass of chlorine (or chloride) in the molecular formula of M(OH)2. You're suppose to find out what the metal M is, and then determine the molar mass of MCl. For example, if you do the work and find out that the metal is sodium, then you would be looking for the mo...

Abigail_Low_1A

Hello! I'm working on Q4 on page 10 of the workbook and I don't really understand how to solve the problem. Can someone explain this to me? Question: 339.20g of Cobalt metal piece is reacted with compressed Fluorine gas to produce a compound with a mass of 996.08g. What is the empirical formula of t...

CHEMISTRY COMMUNITY

Search found 30 matches

Naming priorities

Orientation of the chair conformation

Re: Question 3.15 plus 3.16 Question

Does temperature count for sig figs? [ENDORSED]

Re: Saying Thank You to Dr. Lavelle

Naming cycloalkanes with 2/+ substituents?

Re: Post All Chemistry Jokes Here

Re: Quiz 2 Winter 2017

Re: 2016 Midterm #8A

Inert electrodes?

Internal energy of an isothermal system?

Standard Gibbs Free Energy Calculation Discrepancies?

Re: Post All Chemistry Jokes Here

HW Question 8.9

Re: Final Exam Details and Review Sessions Fall 2016

Re: Post All Chemistry Jokes Here

Re: Post All Chemistry Jokes Here

Re: Formula for coordination complex?

Formula for coordination complex?

Relationship between bond order and bond length?

Re: Post All Chemistry Jokes Here

Re: CN-

Which Lewis structure makes the dominant contribution to a resonance hyrbid?

Re: Problem 2.47

Re: chapter 2 Question 2.29

Resonance vs Resonance Hybrid?

Re: Rydberg Equation, Variations, and which n value to put first.

Re: Energies of the Photon Absorbed and Emitted

Re: Question E.15 [ENDORSED]

Chem Workbook Self Test Q4 [ENDORSED]