Required solvent-to-feed ratio in countercurrent extraction in a countercur rent, equilibrium staged extractor with four equilibrium stages, determine the necessary ratio of extract to feed (sf) to purify bioproduct a to 90% purity from contaminant b. the feed contains two components, 60% a and 40% b, and the partition coefficients are k 13.0 and k-1.

Which are forms of frozen water? check all that apply. dew frost hail rain sleet

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.

Amines are good nucleophiles, even though they are neutral molecules. how would the rate of an sn2 reaction between an amine and an alkyl halide be affected if the polarity of the solvent is increased? amines are good nucleophiles, even though they are neutral molecules. how would the rate of an reaction between an amine and an alkyl halide be affected if the polarity of the solvent is increased? because both reactants in the rate-limiting step are neutral, the reaction will be faster if the polarity of the solvent is increased. because both reactants in the rate-limiting step are neutral, the reaction will be slower if the polarity of the solvent is increased. because both reactants in the rate-limiting step are neutral, the reaction will occur at the same rate if the polarity of the solvent is increased. request answer