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23 March, 16:09

How many moles of neon (Ne) gas have a volume of 4.5L and a pressure of 2.1 atm at 302 K

(The universal gas constant is 0.0821 L•atm/mol•K)

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  1. 23 March, 20:06
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    0.3811 mol.

    Explanation:

    To calculate the no. of moles of a gas, we can use the general law of ideal gas: PV = nRT.

    where, P is the pressure of the gas in atm.

    V is the volume of the gas in L.

    n is the no. of moles of the gas in mol.

    R is the general gas constant,

    T is the temperature of the gas in K.

    ∵ P = 2.1 atm, V = 4.5 L, T = 302 K, R = 0.0821 L. atm/mol. K.

    ∴ n = PV/RT = (2.1 atm) (4.5 L) / (0.0821 L. atm/mol. K) (302.0 K) = 0.3811 mol.
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