I will understand this question to mean
"What is the equivalent measure of 500 nanometers on the centimeter scale?"
The easiest way to get at these scales is by scientific notation (powers of ten).
For example, in scientific notation I could say that 20 meters is 2 x 10^1 meters. 10 to the first power … Read more

Is a value for n (number of mols of gas) given?
If you know a value for n, V=nRT/P
If no value for n is given, I would assume you have one mol; but you should also check with the instructor. There are other less-common forms of the ideal gas law, but I don't believe … Read more

So far as I know, the song was originally done by the Marshall Tucker Band.
Great song, I've had it stuck in my head all night.