Afirst-order reaction has a half-life of 16.7 s . how long does it take for the concentration of the reactant in the reaction to fall to one-fourth of its initial value?

For the following dehydrohalogenation (e2) reaction, draw the zaitsev product(s) resulting from elimination involving c3–c4 (i.e., the carbon atoms depicted with stereobonds). show the product stereochemistry clearly. if there is more than one organic product, both products may be drawn in the same box. ignore elimination involving c3 or c4 and any carbon atom other than c4 or c3.

Adepositional also feature that forms where a stream enters a lake or an ocean is a

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.