What is the balanced equation of calcium carbonate (s) ——> calcium oxide (s) + carbon dioxide (g)?

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    The equation is already balanced
    In terms of molecular format the equation is written as follows:
    ##CaCO_3## ##rarr## ##CaO## + ##CO_2##
    On the left hand side of the equation there are:
    1 Calcium
    1 Carbon
    3 Oxygen
    On the right side of the equation there are:
    1 Calcium
    1 + 2 = 3 Oxygen
    1 Carbon
    Therefore the left side equals the right side and is thus balanced.
    Generally these summarized rules can be followed to balance equations:
    Write the correct chemical formulas for all of the reactants and
    the products.
    Write the formulae of the reactants on the LEFT of the reaction
    arrow; write the formulas of the products on the RIGHT of the
    reaction arrow.
    Count the total number of atoms/ions of each element in the
    reactants and the total number of atoms/ions of each element in
    the products.
    Balance the elements one at a time using coefficients.
    A coefficient is a small whole number that is written in front
    of a chemical formula in a chemical equation.
    It is best to begin with elements other than hydrogen and
    oxygen! These elements often occur more than twice in
    equations.
    Check each atom/ion or poly-atomic ion to be sure that the
    equation is correctly balanced.
    Finally make sure that all of the coefficients are in the lowest
    possible whole number ratios.
    *Un-summarized rules for balancing found at: https://www.greenwichschools.org/uploaded/faculty/arleene_ferko/Unit_8_Notes_7_RULES_FOR_BALANCING_CHEMICAL_EQUATIONS.doc
    Hope I helped 🙂

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