Acetone is a common solvent used to clean glassware in organic chemistry laboratories. It decomposes at 600 degree Celsius in a first order process to produce methane and Ketene. The rate constant at 600 degree Celsius is 8.70x10^-3 s-1 . The reaction can be expressed as:
B) How much time is required for 25% of a sample of acetone to decompose?