Agaseous chemical species (a) is transferred and reacted in equimolecular counterdiffusion in a catalytic particle with cylindrical geometry of radius r. the chemical reaction is elementary and first order with the expression, where k 'is the kinetic coefficient with the units h-1, ca, ra are given in mol / m3 and mol / m3-h, respectively. derive the profile of concentrations and the molar flux proposing a balance of mass transfer.

h let me think

r just means there's a number of carbon in teh chain. for example rcooh means that after x number of carbon, the chain ends with cooh.

explanation:

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.

since electrons are negative the answer is neagtaive