How many moles of chlorine are in 100g of chlorine

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

What is the approximate vapor pressure when the gas condenses at 70 degrees celsius

What do electromagnetic waves carry? how are they produced through which media can they move? where do they transfer energy? what do they not transfer? what do mechanical waves carry? how are they produced? through which media can they move? where do they transfer energy? what do they not transfer?