This formula equation is unbalanced. BaCl sub 2 times aq plus Na sub 2 CO sub 3 aq rightarrow BaCO sub 3 times s plus NaCl times aq Which coefficient should be placed in front of NaCl to balance this equation?

BaCl₂ has 2 chlorine atoms, so the products must also contain 2 chlorine atoms. Placing a coefficient of 2 in front of NaCl gives 2 chlorine atoms and 2 sodium atoms, matching the Na₂CO₃ reactant. The correct choice is 2.

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