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31 January, 17:14

When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 14.4 g of carbon were burned in the presence of 56.5 g of oxygen, 18.1 g of oxygen remained unreacted. What mass of carbon dioxide was produced?

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  1. 31 January, 20:35
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    Mass of carbon dioxide produced = 52.8 g

    Explanation:

    Given dа ta:

    Mass of carbon react = 14.4 g

    Mass of oxygen = 56.5 g

    Mass of oxygen left = 18.1 g

    Mass of carbon dioxide produced = ?

    Solution:

    C + O₂ → CO₂

    Number of moles of C:

    Number of moles = mass / molar mass

    Number of moles = 14.4 g / 12 g/mol

    Number of moles = 1.2 mol

    18.1 g of oxygen left it means carbon is limiting reactant.

    Now we will compare the moles of C with CO₂.

    C : CO₂

    1 : 1

    1.2 : 1.2

    Mass of CO₂:

    Mass = number of moles * molar mass

    Mass = 1.2 mol * 44 g/mol

    Mass = 52.8 g
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