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 t_{1/2} 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) | 1.50 | 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: N_{2}O_{5}(g) → 2NO_{2}(g) + 1/2O_{2}(g),

If N_{2}O_{5} is decomposing with an instantaneous rate of 0.46 mol/L·s, what is the instantaneous rate of formation of 2NO_{2}?

#### 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

- 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

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#### Other Answers

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