Question

The rate constant of a reaction A → B is 0.6 × 103 mole per second. If the concentration of [A] is 5 M, then what will be concentration of [B] after 20 months?
(a) 0.36 M
(b) 0.72 M
(c) 1.08 M
(d) 3.60 M

Answer 1

• Heya user

Answer:

(b) 0.72 M

Explanation:

Reaction's order will be zero and rate constant's unit is mole per second.

K = [ A ]0 - [ A ] / t

0.6 × 10 ^–3 = 5 - [ A ] / 20 x 60

[ A ] = 5 - 0.72

Conc. of B after 20 minutes will be 0.72 M.