The chemical equation between Ba(OH)2 and H2CO3 is Ba(OH)₂ + H₂CO₃ → BaCO₃ + 2 H₂O.
A balanced equation has the reactants are on the left side of the arrow, whereas the products are on the right.
The number in front of a chemical formula denotes the number of moles in a compound. The number of atoms in a single molecule is indicated by subscripts (numbers below an atom).
Thus, the chemical equation is Ba(OH)₂ + H₂CO₃ → BaCO₃ + 2H₂O.
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