Draw the structure of a compound of molecular formula c4h8o that has a signal in its 13c nmr spectrum at ≥ 160 ppm. then draw the structure of an isomer with no rings of molecular formula c4h8o that has all of its 13c nmr signals at < 160 ppm.

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

How many atoms are in 2 moles of phosphorus

Calculate the ph at the equivalence point for the titration of a solution containing 150.0 mg of ethylamine (c2h5nh2) with 0.1000 m hcl solution. the volume of the solution at the equivalence point is 250.0 ml. kb forethylamine is 4.7 × 10−4 .