CHEMISTRY COMMUNITY

905737081

Hi! I am also having a difficult time on this question. I have "Dinitrogen pentoxide, N2O5, decomposes by first‑order kinetics with a rate constant of 3.7×10−5 s−1 at 298 K. How much time, in minutes, will elapse before the N2O5 concentration decreases from 0.0601 mol⋅L−1 to 0.0241 mol⋅L−1?&quo...

905737081

The way I did this problem was using the delta[A]/deltat = -1/b(delta[B]/deltat) equation. The question provides values for t1 and t2 and since t1=0, change in t is equal to t2. Using the chart you solve for delta[A] by subtracting the [A] value corresponding with your t1 value from the value corres...

905737081

Here's a little explanation on the following terms. The term k'1 in the rate equation for the RXN 2NO + O2 –> 2NO2 represents the rate constant for the reverse RXN, 2NO2 –> 2NO + O2. This term is often called the equilibrium constant for the RXN and is related to the rate constant k1 for the forward...

905737081

Based on the definitions of homogeneous catalysts and heterogeneous catalysts, if the catalyst is in a different phase as the reactants it is heterogeneous (even if all of the reactants are in difference phases and one of the reactants is in the same phase as the catalyst). In chemical reactions, if...

905737081

I've had times where it didn't work, but force quitting the application a few times works. However, I have had one time where I had to completely redownload the application. I'm not sure there are any ways to troubleshoot this I think it's just a glitchy app, so I usually just result to doing that e...

905737081

In preparation for the final some things that help me are taking breaks that 1 help me recharge and 2 is something that I enjoy so I don't get burnt out. When it comes to the final and the day of the exam, I like to give myself time where I don't think about the exam right before I take it so I don'...

905737081

^^ Yup it's cumulative but with more of a focus on the material after M2 (electrochemistry & kinetics). ALSO remember that he's giving us 2 "extra credit" questions that are the Respondus questions that he gave us ahead of time from M1 and M2 :)

905737081

“It is only when we take chances, when our lives improve. The initial and the most difficult risk that we need to take is to become honest. —Walter Anderson or "Everyone you will ever meet knows something you don't" –Bill Nye (aka the GOAT)

905737081

the Scandinavian swimmers for a sweet snack or the chili lime rolled tortilla chips are also fire. Could demolish a bag of those in one study session for sure.

905737081

Reeses peanut butter cups. Hands down the best candy. Well unless you're allergic to peanuts that'd be unfortunate.

905737081

I had different numbers ( 39.9g of aluminum at an initial temperature of 85.4 °C ) and I keep getting the wrong answer. I have followed all the steps in the previous posts, but my calculations seem to be wrong.

905737081

Hi! I had different numbers for this problem (ice cube with a mass of 54.2 g at 0.0 ∘C is added to a glass containing 352 g of water at 45.0 ∘C) and I've followed all of the steps described in these posts and I'm still getting the wrong answer...

905737081

I am still confused on this problem. I have followed all the steps provided in all the Chemistry Community posts discussing #5, but am still not getting the correct answer.

905737081

If you go to the Midterm Module on BruinLearn, the M1 announcements pdf has all the information, including the instructions on downloading the Lockdown browser. 15 Multiple Choice questions.

905737081

I am not sure how many questions, but they are all multiple choice. I have also heard rumor of taking our test in-person, but on our laptops utilizing a proctored lockdown browser.

905737081

Based on the problems I have solved so far on Achieve, I believe they are solved the same. However, I am still currently working on a few of the problems with those topics, so I am not 100% sure. But I agree, if there is a difference in formulas, solving, etc. I would love to know.

905737081

In my discussion section, they said that after solving using the assumption that X is very small and getting a percent ionization of over 5%, you need to go back and resolve using the quadratic formula. For this specific question, I also got 9.1 and after going through the problem again using the qu...

CHEMISTRY COMMUNITY

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Re: Achieve #11

Re: Achieve Week 8-10 #2

Re: Pre-Equilibrium Approach

Re: Enzyme homogenous vs heterogenous

Re: Respondus Not Starting?

Re: Final Jitters

Re: Chemistry Final

Re: motivational sayings

Re: Trader Joe's Study Snacks

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Re: Achieve Q.11

Re: achieve week3+4 #10

Re: Problem Set 2 Question 5

Re: Does anyone know the format of the midterm?

Re: Does anyone know the format of the midterm?

Re: Percent Deprotonation vs Percent Ionization

Re: Finding Percent Ionization