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The gas phase decomposition of dimethyl ...

The gas phase decomposition of dimethyl ether follows first order kinetics. `CH_3-O_CH_3(g)rarrCH_4(g)+CO(g)+H_2O(g)` The reaction is carried out in a constant volume container at `500^@C`, and has a half of life of 14.5 minutes. Initially, only dimethyl ether is present at a pressure of 0.40 atm. Assuming ideal gas behavior, the total pressure of the system after 12 minutes will be.

A

1 atm

B

0.75 atm

C

0.50 atm

D

0.25 atm

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The correct Answer is:
B
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