Paraldehyde, a sedative and hypnotic agent, is prepared by treatment of acetaldehyde with an acid catalyst. Draw the structure of the fourth intermediate in this reaction.

Cr(oh)3 -> cr(3+) + 3oh-

The answer is 4 i don't know if its right let me see.

Using dilution equationm1v1 =m2v2 ; where m1 and m1 are the intiial and final concentration, and v1 and v2 are the initial and final volume.5  × 5 m = 8 l  × m2m2 = 25/8 = 3.125 mtherefore; the resulting molarity is 3.125 m

Theyre semiconductors.