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26 June, 15:37

A researcher pumps 0.0128 moles of nitrogen (N2) into a 450 ml chamber held at 20 oC. What is the pressure inside the chamber?

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  1. 26 June, 17:32
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    Pressure inside the chamber is 0.68 atm

    Explanation:

    This is solved by the Ideal Gases Law:

    Pressure. Volume = number of moles. R. T (in K)

    T in K - -> T° C + 273

    20°C + 273 = 293 K

    R - -> Universal Constant Gas = 0.082 L. atm/mol. K

    Let's replace:

    P. 0.450L = 0.0128 mol. 0.082 L. atm/mol. K. 293K

    P = (0.0128 mol. 0.082 L. atm/mol. K. 293K) / 0.450L

    P = 0.68 atm

    Be careful because you have volume in mL and you must convert to L

    450 mL. 1L/1000 mL = 0.450 L
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