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13 September, 03:23

What mass will 2.5 L of chlorine gas be at STP?

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Answers (2)
  1. 13 September, 06:27
    0
    One mole of any gas at STP takes up 22.4 L

    1 mole of gas = 22.4L

    2.5 moles of gas takes up = (22.4 L / 1 mole) x 2.5 mole

    = 56 L
  2. 13 September, 06:32
    0
    Answer: m = 7.7 g Cl2

    Explanation: To find mass of chlorine gas we will first derive the ideal gas law formula and find first the number of moles of Cl2. At STP, Pressure is equal to 1 atm and temperature is 273 K.

    n = PV / RT

    = 1 atm (2.5 L) / 0.0821 L. atm / mole. K (273 K)

    = 0.11 mole Cl2

    Convert moles of Cl2 to grams using the molar mass of Cl2 which is 70 g Cl2.

    0.11 mole Cl2 x 70 g Cl2 / 1 mole Cl2

    = 7.7 g Cl2
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