Anonymous asked in Education & ReferenceHomework Help · 1 month ago

chem help?

A "shielding gas" mixture of argon and carbon dioxide is sometimes used in welding to improve the strength of the weld. If a gas cylinder of this two-part mixture was at 4.0 atm pressure and this mixture was 90.% argon, what would be the pressure due to the carbon dioxide gas component?

1 Answer

  • 1 month ago

    Dalton's law states that in a mixture of non-reacting gases, the total pressure exerted is equal to the sum of the partial pressures of the individual gases.

    Total pressure = 4.0 atm

    90.% of that pressure was due to argon:

    (0.90 x 4.0 atm) = 3.6 atm.

    Pressure due to carbon dioxide

    = (4.0 - 3.6) atm

    = 0.40 atm ……. to 2 sig figs

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