Just by merely looking at the two sides(Reactant and Product sides), the balancing of the elements can be done. This is suitable for simple equations. $$Example 1: \hspace{1cm} CaCO_3 + H_2SO_4 \rightarrow CaSO_4 + CO_2 + H_2O$$ Looking to the two sides, we find that the equation is already balanced. The

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