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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?

can someone tell me how many moles i need and what other formula do i use?

  • chem -

    moles O2 = grams/molar mass.
    Then PV = nRT, substitute and solve for P for the first part.
    Use PV = nRT for the second part and solve for P.
    I would use PV = nRT for the third part.

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