The formula X + ZY → XZ + Y shows that A. X and Y bonded into a more complex molecule.
B. ZY has decomposed into two smaller compounds.
C. X is a more reactive compound than Y.
D. Y has changed into a new compound.

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.

answer seismograph;