CHEMISTRY COMMUNITY

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I was wondering whether Cis was with both being the same orientation or the same direction. Can it still be Cis with a an equatorial up and equatorial down or would that be considered Trans? Thanks! that would be considered trans. In order for it to be Cis the direction must be the same; whether or...

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A catalyst will appear in the steps of a reaction mechanism, but it will not appear in the overall chemical reaction (as it is not a reactant or product). When writing your net ionic equation you would write the catalyst above the arrow dividing the reactants and products. Don't forget though that c...

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Zhanna Khnkoyan 2E wrote:Will the posts made before the actual final be considered for the "weekly online discussion," so would a question posted tonight count? Thanks!

yes, pretty sure it will count

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I asked the guy sitting next to me if he had any Sodium Hypobromite... He said "NaBrO"

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Q: What kind of fish is made out of 2 sodium atoms?
A: 2 Na

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Hi everyone! I was wondering if someone could clarify the equatorial bond angle on cyclohexane. Is the equatorial bond angle not 90 degrees because the carbon has bond angles of 109.5 degrees or is this due to other reasons like electrostatics? Thanks so much! The carbon-carbon bonds along the cycl...

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Teddy_Rosenbluth wrote:Should we be familiar with the derivations listed in the chapter summaries or should we be familiar with all the derivations (i.e Electrochemistry derivations?)

Luckily, we won't have to derive anything!

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ntruong2H wrote:
Tara_Shooshani_3N wrote:Since U=0, w=-q

So q and w don't equal 0? I thought that since it's isolated, it can't expand/contract and heat can't be exchanged so they'd be = 0

you are right. In an isolated system, heat, mass and energy cannot flow from the system to its surroundings or vice versa so they equal 0.

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shreya_mantri_3I wrote:A question: Is the functional group given preference over a double or triple bond during naming? Or is the double or triple bond given preference over the functional group?

the functional group is given priority.

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Andrea Medina 1A wrote:When theres both a double bond and a functional group group which gets priority?

the functional group gets priority.

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tpat14 wrote:Is this also effective for the final?

well luckily, we have more than three days! In addition to reviewing the practice finals and old midterms, you can try to dedicated a topic per day... so thermo, kinetics, electrochem, organic chem. That could help you be more organized with your approach!

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Can someone explain when to use these? So basically, we use these terms depending on the structure of the molecule. It is a type of systematic naming. The important thing to look at, in terms of structure, is how many carbons are directly attached or "branched off" from the one carbon of ...

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Like you said, K is defined as Kforward/Kreverse. So even though it might make more sense to you for the concentrations of the products= Kforward, you have to think about what that actually means. The products will actually make the reactants, and we know that this means the reaction is occurring in...

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Time is actually given in the units. Upon second look at the units, you can see that the concentration of NH3 is given in mmol/L h. h = 1 hour. So from the equation we know that the rate of consumption of H2 = Rate of NH3. Taking into consideration the coefficients, you would set the equation up as ...

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if you look higher up the page, M represents the exponent for the ratio of rate 2 and 1. This gives the order of NO2- because the concentration of NO2- changes while [NH4+] remains the same. Likewise, N represents the exponent for the ratio of rate3 and 2. The gives the order for [NH4+] because the ...

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As for number 7, when do we know to use the rearranged integrated rate law and when to use the differential rate law? When an initial concentration is given along with its concentration at a given time, the integrated rate law is easiest to use in order to find the constant "k" of the rea...

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When using the integrated rate law you can determine the concentration of a substance at any given time. The differential rate law is only applicable to initial rates when t=0.

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If a reaction is "first order," doubling the concentration of a reactant doubles the rate. If a reaction is "second order," doubling the concentration of the reactant increases the rate by 2^2, or four.

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"what if i told you......"

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if an energy level is considered degenerate, then two or more different states of the quantum mechanical system will share the same value of energy. Recall that the Boltzmann formula for entropy is S= k ln W. The quantity W is the "number of ways that the atoms or molecules in the sample can be...

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hi tina! I live in canyon point and would be really down to study together!

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yes. You can use the tables of standard enthalpies of formation to determine the answer to any enthalpy problem. After you ensure that everything is in standard state and the reaction is correctly written (properly balanced), then you should be able to solve for the right answer. The only thing you ...

CHEMISTRY COMMUNITY

Search found 22 matches

Re: Chair conformations Cis and Trans

Re: Catalysts in Net Reaction

Re: Final Exam Details and Review Sessions Winter 2017

Re: Post All Chemistry Jokes Here

Re: Post All Chemistry Jokes Here

Re: Equatorial Bond Angle

Re: Derivations

Re: dU, q, w

Re: Naming [ENDORSED]

Re: Naming [ENDORSED]

Re: Most efficient way to study w/ only 3 days until the midterm

Re: Iso, Neo, and Tert

Re: Equilibrium Constant K

Re: Self-Test 15.2A

Re: overall rxn order

Re: Quiz 2 Winter 2017

Re: Differntial rate law vs. Integrated rate law

Re: First vs. Second Order

Re: Post All Chemistry Jokes Here

Re: Calculating Entropy

Re: Study Group Chem 14B

Re: Standard Enthalpy of Formation Clarification