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4 April, 16:49

What is that the theoretical yield of aluminum oxide I if 3.20 mol of aluminum metal is exposed to 2.70 mole of oxygen

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  1. 4 April, 19:14
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    163.2g

    Explanation:

    First let us generate a balanced equation for the reaction. This is shown below:

    4Al + 3O2 - > 2Al2O3

    From the question given, were were told that 3.2moles of aluminium was exposed to 2.7moles of oxygen. Judging by this, oxygen is excess.

    From the equation,

    4moles of Al produced 2moles of Al2O3.

    Therefore, 3.2moles of Al will produce = (3.2x2) / 4 = 1.6mol of Al2O3.

    Now, let us covert 1.6mol of Al2O3 to obtain the theoretical yield. This is illustrated below:

    Mole of Al2O3 = 1.6mole

    Molar Mass of Al2O3 = (27x2) + (16x3) = 54 + 48 = 102g/mol

    Mass of Al2O3 = ?

    Number of mole = Mass / Molar Mass

    Mass = number of mole x molar Mass

    Mass of Al2O3 = 1.6 x 102 = 163.2g

    Therefore the theoretical of Al2O3 is 163.2g
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