Anonymous
Anonymous asked in Science & MathematicsChemistry · 1 decade ago

please help...chemistry?

Indicate the products and balance the following equation for a combustion reaction. Include subscripts for the states of the products.

___C3H6O(s) + ____O2 -----> _____________

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  • 1 decade ago
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    Complete combustion of an organic molecule containing only C, H, and O (or just C and H) yields water (H2O) and carbon dioxide (CO2).

    One way to solve this is to observe that the two oxygen atoms in one O2 molecule added to the one oxygen atom in one molecule of C3H6O gives three total oxygen atoms, which is just the right amount of oxygen atoms to pair with the six hydrogen atoms in one molecule of C3H6O to form three molecules of water: 6H + 3O --> 3(H2O). Then you need three more O2 molecules to pair with the three carbon atoms in one molecule of C3H6O to form three CO2 molecules.

    The net reaction is adding a total of four O2 molecules to one molecule of C3H6O to yield three water molecules and three CO2 molecules.

    1 C3H6O(s) + 4 O2 -----> 3 H2O + 3 CO2

    If you double check your answer, you'll find that there are a total of 3 C atoms on both sides of the equation, 6 H atoms, and 9 O atoms. Therefore the equation is balanced.

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