In an ideal CSTR, the species A, B, and C are converted into the products R and S according to the following reaction: A + C R R(rR = k1CACC) and B + C R S(rS =k2CBCC) if k1 = 2.5 k2 and the original mixture consist of equimolar amounts of A, B, and C, what will be the fraction of R in the product mixture R and S when conversion of A is 50% ?

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa.s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)