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23 September, 22:01

What mass of hydrogen peroxide must be used to produce 1.00 L of oxygen gas at 25.0°C and 1.00 ATM?

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  1. 23 September, 22:21
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    2.79g

    Explanation:

    First let us obtain the number of mole of O2 produced at 1atm and 25°C. This is illustrated below:

    V (volume) = 1L

    P (pressure) = 1 atm

    T (temperature) = 25°C = 25 + 273 = 298K

    R (gas constant) = 0.082atm. L/Kmol

    n (number of mole) = ?

    Using the ideal gas equation PV = nRT, the number of mole can be obtained as follow:

    PV = nRT

    n = PV / RT

    n = 1x1 / (0.082x298)

    n = 0.041mole

    Therefore the number of mole of O2 produced is 0.041mole.

    Now let us generate a balanced equation for the decomposition of Hydrogen peroxide (H2O2) to produce oxygen (O2). This is shown below:

    2H2O2 - > 2H2O + O2

    From the equation,

    2 moles of hydrogen peroxide (H2O2) produced 1 mole of oxygen (O2).

    Therefore, Xmol of Hydrogen peroxide (H2O2) will produce 0.041mole of oxygen (O2) i. e

    Xmol of Hydrogen peroxide (H2O2) = 0.041 x 2 = 0.082 mole.

    Now let us calculate the mass of H2O2 in 0.082 mole of H2O2. This is shown below:

    Molar Mass of H2O2 = (2x1) + (16x2) = 2 + 32 = 34g/mol

    Number of mole of H2O2 = 0.082 mole

    Mass of H2O2 = ?

    Mass = number of mole x molar Mass

    Mass of H2O2 = 0.082 x 34

    Mass of H2O2 = 2.79g

    Therefore, 2.79g of Hydrogen peroxide (H2O2) is used in the reaction
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