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Nicholas
Nicholas asked in Science & MathematicsChemistry · 2 weeks ago

I need help with some chem homework ?

The initial volume and pressure of a gas is 90.5 kPa and 4.56 L. If the conditions change so the gas now has a

pressure of 780 torr, a volume of 6.54 L and a temperature of 198°C, what was the initial temperature?

1 Answer

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  • Jim
    Lv 7
    2 weeks ago

    PV=nRT <<<memorize!!

    n is moles, R is gas constant (use correct one!), T is temp in K (C+273.15)

    Since you have a before and after with the same n &R simplifies to

    PV/T initial  = PV/T final

    Now sub in your numbers and solve, round answer to 3 sigfigs

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