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25 October, 18:00

How does the ability to balance a chemical equation relate to that reaction obeying the Law of Conservation of Matter?

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  1. 25 October, 18:11
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    Example:

    CH4 + 2 O2 → CO2 + 2 H2O

    In the balanced equation above, 1 mole of CH4 will react with 2 moles of O2 to produce 1 mole of CO2 and 1 mole of H2O.

    The mass of 1 mole of CH4 = 12 + (4 * 1) = 16 grams

    The mass of 2 moles of O2 = 2 * 32 = 64 grams

    Total mass of reactants = 16 + 64 = 80 grams

    The mass of 1 mole of CO2 = 12 + (2 * 16) = 44 grams

    The mass of 2 moles of H2O = 2 * 18 = 36 grams

    Total mass of products = 44 + 36 = 80 grams

    Before the reaction, there was 80 grams of matter, and after the reaction there is 80 grams of matter!

    Matter is conserved!
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