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Consider a 790-mL container at 21 °C in which the pressure of argon is 1.98x106 Pa.

a) What mass of argon (in g) is present in this container?
b) How many molecules is this?

  • Chemistry -

    a) Use PV = nRT, solve for n
    n = grams/molar mass, solve for grams.

    b) 1 mole contains 6.022 x 10^23 molecules. How many moles do you have?

  • Chemistry -

    WHich (R) do I have to use

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