chemisty help please
posted by Billy .
A scuba diver's tank contains .25 kg of oxygen compressed into a volume of 4.3 L (for oxygen, 32g = 1 mole)
Calculate the gas pressure inside the tank at 9 degrees Celsius
What volume would this occupy at 26 degrees Celsius and .95 atmospheres?

Use the ideal gas law. moles O2= 250/molmassO2
P= nRT/V 
what would the number of moles equal then? and R= .0821 K atm L mol?

I still don't get it.. lol

.29kg=290g*32g(Molar mass of O2)
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