250 mL of a solution of calcium oxalate is the evaporated until only a residue of solid calcium oxalate is left. The mass of the residue recovered from the container was 154 mg. What is the
solubility product of calcium oxalate?

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.

the objects have the same charge is correct.

nathan lee