Calculate what volume of the following solutions is required to obtain 0.280 mol of each solute. (a) 0.201 M AlCl3 L
(b) 3.48 M HCl L

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.