Which of the following equations violates the law of conservation of mass? a. fecl3 + 3naoh yields fe(oh)3 + 3nacl b. cs2 + 3o2 yields co2 + 2so2 c. mg(clo3)2 yields mgcl2 + 2o2 d. zn + h2so4 yields h2 + znso4

Hi!

The chemical equation that violates the law of conservation of mass is C

Mg(ClO₃)₂ → MgCl₂ + 2O₂

Let's see why:

The number of atoms from each element should be the same on both sides of the equation.

For Mg:1 atoms Left Side=1 atoms Right Side
For Cl:2 atoms Left Side=2 atoms Right Side
For O: 6 atoms Left Side ≠ 4 atoms Right Side

So, the equation is not balanced for O. The correct balanced equation is the following:

Mg(ClO₃)₂ → MgCl₂ + 3O₂

Have a nice day!

The correct answer is "atomic weight".