The specific activity of an enzyme is defined in terms of the amount of solution catalyzed...

The specific activity of an enzyme is defined in terms of the amount of solution catalyzed under a given set of conditions divided by the product of the time interval for the reaction times the amount of protein in the sample:

A 0.10 mL sample of pure β-galactosidase (β-g) solution that contains 1.00 mg of protein per liter hydrolyzed 0.10 m mol of o-nitrophenyl galactoside (o-n) in 5 min. Calculate the specific activity of the β-g.