Phospholipids are an important component of the cell membrane due to their unique structure and function. Phospholipids have hydrophilic phosphate heads and long hydrophobic tails. These tails do not mix in water because they are composed of what kind of hydrocarbon?

What would most likely be the transmittance of a 0.70 m solution of solute a?

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

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?