2A → B + C

The above reaction is run and found to follow second order kinetics with a rate constant of 1.30 x 10-3 M-1sec-1. If the initial concentration of A is 1.68 M, what is the concentration after 195 seconds

Answer : The concentration after 195 seconds is, 1.18 M

Explanation :

The expression used for second order kinetics is:

where,

k = rate constant =

t = time = 195 s

= final concentration = ?

= initial concentration = 1.68 M

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

Therefore, the concentration after 195 seconds is, 1.18 M

h let me think

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)