# science

What is the density of Radon (Rn) gas at STP (standard temperature and pressure)? How do I solve/set up this problem? Thank you!

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1. If it is a perfect gas it is 22.4 moles per liter at STP

molecular mass = 222 grams/mol
so

222 grams/22.4 liter = 9.91 grams/liter

You can convert that to Kg/m^3 or whatever if you chose.

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posted by Damon
2. brain stalled out
22.4 liters / mol

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posted by Damon
3. http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/idegas.html

look under section on Standard temperature and pressure

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posted by Damon
4. It is worth remembering that one mole is 22.4 liters at STP because often it is faster than going through P V = n R T

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posted by Damon
5. This is helpful thank you!

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posted by Cassie
6. You are welcome :)

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posted by Damon

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