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Half life

A certain zer...

Question

A certain zero order reaction has k = 0.025 M/S for the disappearance of A. What will be the concentration of A after 15 seconds if the initial concentration is 0.50 M?

0.05M

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0.375M

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0.125M

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0.06M

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Solution

The correct option is C 0.125M
For zero order reaction
$A_{0} - A_{t} = k t 0.5 - A_{t} = 0.025 \times 15 A_{t} = 0.125 M$

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