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Question 128 ptsA rate law was observed to be: Rate 0.0125 L/(mol*s) [NOz]? there is initially NOz present at 0.100 M how much NOz will be present after 50 seconds?...

Question

Question 128 ptsA rate law was observed to be: Rate 0.0125 L/(mol*s) [NOz]? there is initially NOz present at 0.100 M how much NOz will be present after 50 seconds?10.6 M 0.525 M 0.0535 M 0.0941 M 0.107

Question 12 8 pts A rate law was observed to be: Rate 0.0125 L/(mol*s) [NOz]? there is initially NOz present at 0.100 M how much NOz will be present after 50 seconds? 10.6 M 0.525 M 0.0535 M 0.0941 M 0.107



Answers

In experiments on the decomposition of azomethane, the following data were obtained: $\begin{array}{lll} & \text { Initial } & \\ & \begin{array}{l}\text { Concentration } \\ \text { of Azomethane }\end{array} & \text { Initial Rate } \\ \text { Exp. 1 } & 1.13 \times 10^{-2} \mathrm{M} & 2.8 \times 10^{-6} \mathrm{M} / \mathrm{s} \\ \text { Exp. } 2 & 2.26 \times 10^{-2} \mathrm{M} & 5.6 \times 10^{-6} \mathrm{M} / \mathrm{s}\end{array}$ What is the rate law? What is the value of the rate constant?

Percentage by S. And two X equals two among right. Sn cu divided by amon right S. And two plus I'm on button. S. And one and 200. Therefore this is the close to amount by S. And two S. Three coin. Zero Into 10 to the Power -5. Into concentration of crude form of butane into concentration of I don't say that one. They were aided by amount by sn two class. And then I saw the amount by S. And one is 3.20 and returned to the bar -5 And two. Constitution of everything. Thank you. Concentration of hydroxide ion plus one point fight into Mhm 1.5: 10 to the -6. Into concentration of probability in 200. So the sequence to 3.20 into 10 to the -5. Into concentration of fruit from a beauty and do concentration of hydroxide at any given one morality. In 200 divided by take this to form a beauty common. Therefore concentration of two from a beating is much driver cheap point 20 and to tend to the 200.-5 Into concentration of hydroxide ion one morality. Thus 1.5 In 210 to the Power -6. Therefore these two common beauty and this to get canceled. Therefore it was too cheap. Point 20 in 10 to the par -5 in 200 divided by 3.20 and 10 to the- side. Yes 1.30 .15. Thank you Tend to the par -5 which is the question three point 20 to 10 to the power minus fight, Divided by 3.25 into. And the department of spite in 200 This is a close to 96 B person taste by right I sent to S equals two. Yeah C'mon bye. S and two divided by amount. Right? S. H. Two. Yes I'm on right Sn one in 200. Therefore this is equals two. She points to zero and 2. 10 to the Power -5 into concentration of Obama Britain. And do concentration of hydroxide ion in 200. Divided by amount by S. N. Two plus amount by S. And one is 3.20 And to 10 to the power -5 into concentration of from a beauty and do concentration of hydroxide ion Plus 1.5. And to tell to the power my next states into concentration of Groupama tweeting with the sequence to 3.20 into 10 to the Power -5. Into concentration of food from a beauty. Mhm. Yeah. Thank you. Concentration of hydroxide is given That is 0.01 more oddity and 200 if identified. Take this constitutional to promote common mm. Therefore from a day. So the concentration of a good day into three point And 10 to the Power -5. Into 0.001. Yes, 1.5 into Tend to depart my last six. Yeah, consultation of Obama beauty and this concentration of automobile get cancer. Therefore is it supposed to cheap point? So the local wine 32 and 10 to the power -5 the way I did fine 0.00 she 2-10 to the power -5 Plus your .15 And 10 to the Power -5. Okay. Mhm. Sorry. Mhm. So this is equal strips 0.2 divided by 0.15 she Uh huh. Which is equal to 2.09% Age.

All right. Said this question s says that the great constant for first order decomposition at 45 degree C of end to go, guys, um, dissolved in core form is 6.2 times 10 to the negative poor, uh, per minute. That then gives us the chemical equation, which I wrote down right here. Um, access. What is their rate of the reaction? One. The concentration of into five equals 0.40 polarity. So I'm just gonna write down the information that it gives us in the question, Enciso. It tells us the great constant K is six point two times 10 to the negative four per minute. And then it also tells us, um, the Moeller concentration of end to both five. So it tells us that it is 0.40 molar ity. So to answer this question, um, you just have to write down the re equation for this chemical equation. And to do that, you just have to remember that it tells you inthe e question that it's a first order reaction. So you only have one product here, so you can write your, um uh, great, um, equation. As rate equals k times the concentration of you're reacting and 205 to the first power because it's a first order reaction. And so, from here, you just have to fill in your information. Um, you know the value of K. It's at 6.2 times 10 to the negative four per minute. And then, you know, you're Mueller concentration of your reactant the 0.40 ah moles per leader or malaria t. And then from here, you just have to put this into your calculator. And when you do that, you get 2.5 times 10 to the negative four. Um, and then for your units, you have moles. And then you have per minute her leader hoops. That should be leaders, and that is your answer.

So initial rate. This is given by rate constant and product of the rate constant and the concentration, the rate constant. Okay and the concentration is initial concentration here. This is given in the question that the red constant is one into 10 ways to power -2. This is the rate constant which is given to us and the initial concentration is one murder. This is also given to us integration. So that's why the initial rate will be terroristic AR -2. And this will be Wanting to generously 4 -2. Moon for later per second. So this is the initial read now the final the b part. So that be part or be part for foster and reaction or fast dollar ricin. So we have a equation that is the rate constant. K is equal to 2.303 divided by a T long divided by a minus X. So is the initial concentration and a minus X. Is the final concentration here. So Their content is known to us. That is standards of AR -2. We have sold it 2.303 divided by 30 times the time is here. One minute. This is also given to us one minute time and this is to be converted into second. So we will multiply it by 60 because we all know that one minute If they call to 60 seconds, one minute is equal to 60 seconds. So log they're the initial concentration. So this is the same. Right? So we can cancel also this will be one minus one minus 61 divided by one minus x. Okay so solving this equation we will have one minus X. Is equal to 0.549. So this is the final concentration here more later. So now we have to find the rate after one minute. Right? Great after bandwagon is equal to Yeah Into one -X. This is what This is the great constant. And this is the final concentration here. 1 -1. With the final concentration, right? So they will be given by Rate constant is similar. That is standards department to or you can also say one into tennis department to 1 -6 is 0.549. That is the funny concentration what we have sold here. So solving it will be 5.49 multiply by Can raise the bar -3. Born for later. What a second. So this will be the rate For the reaction after one minute.

Ah, used Given the tough on the question So the exper uh, as for experiment experiment 11.18 to 10 to the power minus five M, as in Vegas is K 0.50 am Still the power and take it is one and I'm gonna excess part experiment 23.6 and to 10 to the power minus five. I am, as in verse, is a call to cave 0.1, double zero and to the power. And just to so divided question one with a question, too. We get, uh, 1.8 and 2 10 to the power minus five and as inverse divided by 3.6 and to 10 to the power minus prize. And as invest, which is of course, took a 0.50 a m to the power and case 0.1 double zero m to the power and just half is it called 2.50 by 0.1 double zero. So the power and so how physicals to have to the power and therefore m is it called to one. So the composition reaction is the first order First orders reaction. Yeah, eso we should note that alternatively, you can notice as the rate of the reaction the bulls on doubling the concentration Eso You can say that the rate is directly proportional to the concentration off and 205 and the reaction is first order reaction.


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