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Chelsie Lynn<3
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Chelsie Lynn<3 asked in Science & MathematicsChemistry · 1 decade ago

Chemistry Help 101 PLZZZZ :]]?

I really need some assistance. If possible, please show work. Thanks<3

What mass of bromine gas(Br2) is contained in a 25L tank of 15oC when the pressure of the gas is 11.5atm??

a.1230g

b.610g

c.1865g

d.1940g

2 Answers

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  • Live 4 Something or Die 4 Nothin
    1 decade ago
    Favorite Answer

    PV = nRT

    n = PV / RT

    n = 11.5atm * 25L / ( .0821 Liters*atm / K*mol * 288K)

    n= 12.16moles

    grams / mw = mols

    grams = mols * mw

    grams = 12.16 * 79.9 * 2 = 1943.17 grams

    so choice D

    Source(s): Chemistry Major
  • mispeldx
    1 decade ago

    PV=nRT

    15oC=288 K

    11.5atm(25L)=n(0.08206 L atm/mol K)(288K)

    n=12.17 mol Br2

    12.17 mol Br2 (159.8 g Br2/1 mol Br2) = 1945 g Br2~ 1940 g

    Source(s): ap chem
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