chemistry

Mixtures of helium and oxygen are used in scuba diving tanks to help prevent ‘the bends’, a
condition caused by nitrogen bubbles forming in the bloodstream. If 95 L of oxygen and 25
L of helium at STP are pumped into a scuba tank with a volume of 8.0 L, what is the partial
pressure of each gas in the tank and what is the total pressure in the tank at 25 oC?

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  1. dont answer i figured it out:D

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  2. mols O2 = 95/22.4 = ?
    mols He = 25/22.4 = ?
    Use PV = nRT and substitute mols O2 fo pO2.
    Do same for He for pHe.

    Ptotal = pHe + pO2.

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  3. is the answer 12.96?

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  4. and 3.41

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  5. The answer is $$$

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