20. Solving a chemistry problem

2. The rate constant for the decomposition reaction of acetone dicarboxylic acid CO(CH2COOH)2→CO(CH3)2+2CO2 (first order reaction) at 273 K is equal to 2.46*10-5 min-1, at 313 K – 5.76*10 -3 min-1. Calculate the time during which the reaction will complete 70% at T=323 K.