Akey step in balancing chemical equations is correctly identifying the formulas of the reactants and products. for example, consider the reacti on between calcium oxide, cao(s), and h2o(l)
to form aqueous calcium hydroxide. write a balanced chemical equation for this combination reaction, having correctly identified the product as
ca(oh)2(aq).

CaO + H2O= Ca(OH)2

Explanation:

The rule of balancing chemical equation states that the total number of atoms an element on the right hand side, must equal the total number of atoms of the same element on the left hand side of the reaction equation. This rule is satisfied in the equation above. For example, there are two oxygen atoms at the RHS and two at the LHS.

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