Chemistry
posted by Help please .
I havent been at school for 8 days due to somthing wrong with my heart, but the teachers gave me work. I have no clue how to do them. I really need help please, There all due tomarrow.
Determine the density of chlorine gas at 22C and 1.00 atm pressure.

You can rearrange the old standby equation of PV = nRT to
PM = (g/v)RT and g/v is density; M is molar mass.
Remember to use T in Kelvin. 
I giving up, i cant do these