Aliquid-process feed stream contains 99 mol-% of species 1 and 1 mol-% of impurity, species 2. the impurity level is to be reduced to 0.1 mol-% by contacting the feed stream with a stream of pure liquid solvent, species 3, in a mixer-settler. species 1 and 3 are essentially immiscible. owing to “good chemistry”, it is expected that species 2 will selectively concentrate in the solvent phase. (a) what is the mole fraction x2 of the impurity in the solvent phase leaving the mixersettler? (b) determine the required moles of solvent ns per mole of feed.

Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)

Asolid that forms and separates from a liquid mixture is called

Increasing the substrate concentration in an enzymatic reaction could overcome which of the following? a) the need for a coenzymeb) allosteric inhibitionc) competitive inhibitiond) insufficient cofactors