# Chemistry

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a diver exhales a bubble with a volume of 250mL at a pressure of 2.4atm and a temp. of 15*C. How many gas particles are in this bubble?

• Chemistry -

Use PV = nRT and solve for n = number of moles.
Then remember 1 mole of a gas contains 6.022E23 molecules.

• Chemistry -

so is it 2.9 E26??

• Chemistry -

PV = nRT or n = PV/RT
n = (2.4atm x 0.25L)/(0.08206L*atm x 288 K) = 0.0254 moles.
0.0254 moles x 6.022E23 = approximately 1.5E22 molecules.

• Chemistry -

k thanks so much for your help!

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