The decomposition of hydrogen peroxide in dilute sodium hydroxide solution is described by the equation:

2H₂O₂ (aq)➞ 2H₂O (l) + O₂ (g)

The reaction is first-order in H₂O₂, the specific rate constant for the consumption of H₂O₂ at 20 C is 1.8 X 10-5 s^-1 and the intial concentration is 0.30 M

What is the half-life (in hours) of the reaction at 20 C?

What is the molarity of H₂O₂ after four half-lives?

How many hours will it take for the concentration to drop to 25 % of its original value?

What will be the concentration of the H₂O₂ after 555 minutes?