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16 January, 11:39

The combustion of ethane (C 2 H 6) produces carbon dioxide and steam. 2 C 2 H 6 (g) + 7 O 2 (g) ⟶ 4 CO 2 (g) + 6 H 2 O (g) How many moles of CO 2 are produced when 5.90 mol of ethane is burned in an excess of oxygen?

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  1. 16 January, 14:46
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    5.90 moles of ethane, C₂H₆, is burned in an excess of oxygen to produce 11.8 moles of CO₂.

    Explanation:

    To answer the question, we examine the chemical reaction as follows

    2C₂H₆ (g) + 7O₂ (g) ⟶ 4CO₂ (g) + 6H₂O (g)

    From the chemical reaction it is seen that 2 moles of ethane, C₂H₆, is required to produce 4 moles of CO₂

    This means that 1 mole of C₂H₆, is required to produce 2 moles of CO₂

    Since we are asked to find out how many moles of CO 2 are produced when 5.90 moles of ethane is burned in an excess of oxygen and we already know that 1 mole of C₂H₆, is required to produce 2 moles of CO₂, we multiply both the 1 mole of C₂H₆ and the 2 moles of CO₂ by 5.90 to obtain;

    (5.90 * 1 mole) of C₂H₆ is required to produce (5.90 * 2 moles) of CO₂ or

    5.90 moles of C₂H₆ is required to produce 11.8 moles of CO₂.
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