Suppose a scuba diver spends several hours 20 m below the surface breathing a normal atmospheric air mix (including 78% nitrogen gas) that has been pressurized to 3 Atm. Once the partial pressure of nitrogen in the air in his lungs and in his blood equilibrate, what is the partial pressure of nitrogen gas in his blood?

Your roll: experienced electron speech is adressed to: a new "freshman class" of electrons job: write a speech task: you are to pretend that you are giving a speech to a new group of electrons. be sure to mention their placement in an atom, their charge, and their role in chemical bonding (ionic and covalent) be specific!

1. list three scientific reasons cockroaches may fly.

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?