In acetic acid vapor, molecules exist as monomers and others as dimers. If the density of the vapor at 76.85 ° C and 1 atm is 3.23 g / L, what is the percentage of molecules
that form dimers?
to. 54.3%
b. 26.4%
c. 14.7%
d. 5.6%

Liquid from a brewery fermentation contains 10% ethanol and 90% water. part of the fermentation product (50,000 kg/h) is pumped to a distillation column on the factory site. under current operating conditions, a distillate of 45% ethanol and 55% water is produced from the top of the column at a rate of one-tenth that of the feed. what is the composition of the waste "bottoms" from the still?