separation process

3) A gas stream containing 90 mol% N2 and 10% CO2 is passed through an absorber, in which pure water at 5 C is used as solvent. The total pressure is 10 atm. The fluid flow used is 1.5 times the lowest fluid flow. The Henry's constant for CO2 in water at this temperature is 876 atm/mol fraction.

Determine the number of equilibrium steps required to absorb 92 mol% CO2