Suppose you are a construction worker. You use aluminum for a window frame, copper
for wiring, and iron for nails. Use the properties of these materials to justify their specific
uses.

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.