Nuclear power plants require large volumes to cool reactors and convert heat to electricity.
a. air
b. water
c. salt
d. uranium

water

Explanation:

ion know my bf told me it was water and i got it right

Answer :

(a) The concentration of after 1.00 hr will be 0.0037 M

(b) The concentration of after 1.00 day will be 0.00060 M

Explanation :

(a) The expression for first order reaction is:

where,

= concentration of at time 't'  = ?

= concentration of at time '0' = 0.0040 M

k = rate constant = (assuming the power of 10 from the correct source)

t = time = 1.00 hr = 3600 s (1 hr = 3600 s)

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

Thus, the concentration of after 1.00 hr will be 0.0037 M

(b) The expression for first order reaction is:

where,

= concentration of at time 't'  = ?

= concentration of at time '0' = 0.0040 M

k = rate constant =

t = time = 1.00 day = 86400 s (1 day = 86400 s)

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

Thus, the concentration of after 1.00 day will be 0.00060 M