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# ) For the reaction X--> Z; . If you start with 0.751 M of X and k is 0.77/min, what is the concentration of X after 2.24 minutes.)For a reaction X-->...

1.) For the reaction X--> Z; .  If you start with 0.751 M of X and k is 0.77/min, what is the concentration of X after 2.24 minutes.

2.)For a reaction X--> Y; . If k is 43.218 min-1, what is t1/2 in minutes.

3.) For the reaction X--> Y, .How many minutes will it take for the concentration of X to fall from 0.894 to 0.154.  In this question k is 0.737/min.

4.)

For the hypothetical decomposition: X(g) → 2 Y(g) + 3 Z(g).

The initial rate of decomposition of X was measured at a series of different concentrations with the following results.

 [X], (mol/L) 1.5 0.496 0.297 0.212 rate, mol/L·sec 3.038 0.332 0.119 0.061

rate = k[X]m

The rate constant k is______________ /sec and the order with respect to X is_________ .

5.) For the reaction: N2O5(g) → 2NO2(g) + 1/2O2(g),

If N2O5 is decomposing with an instantaneous rate of 0.46 mol/L·s, what is the instantaneous rate of formation of 2NO2?

#### Top Answer

1) FOr this reaction ln[A] = ln[A]o - kt ln[A] = ln 0.75 - 0.77 x2.24 ln[A] = -2.012 [A] = e -2.012 X = 0.133 M after 2.24... View the full answer

5 comments
• See the right answers properly worked out
• rghosh1976
• Jul 19, 2016 at 10:03pm
• pl choose and rate
• rghosh1976
• Jul 19, 2016 at 10:03pm
• the rate constant K is 9.15 for number 4?
• jamais4
• Jul 19, 2016 at 10:14pm
• never mind lol thank you so much i got 5 out of 5 and you were alot of help
• jamais4
• Jul 19, 2016 at 10:19pm
• Thanks by the way k of 9.15 is not possible try to apply to the equation you will see that for all the rates X will be a very small number
• rghosh1976
• Jul 19, 2016 at 10:20pm

#### Other Answers

Attached is a detailed explanation... View the full answer

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1 comment
• hope it is helpful. thank you
• elonsky1
• Jul 19, 2016 at 9:55pm

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