In a zero order reaction, it takes 342 seconds for 75% of a hypothetical reaction to decompose. Determine the half-life t1/2} in units of seconds. Do not enter units with your numerical answer.

Answer : The half-life is,

Explanation :

First we have to calculate the rate constant for zero order reaction.

The expression used is:

where,

= let initial concentration = 100

= final concentration = 25

t = time = 324 s

k = rate constant = ?

Now put all the given values in the above expression, we get:

Now we have to calculate the half-life.

The expression used is:

Thus, the half-life is,