CaCl2+ 2AgNO3 → Ca(NO3)2 + 2AgCl:

Count the atoms on each side. Both sides have 1 calcium atom, 2 chlorine atoms, 2 silver atoms, 2 nitrogen atoms, and 6 oxygen atoms. Since every element has the same number of atoms on both sides, the equation is balanced; the correct choice is A, “balanced.”

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