Answer;
Equal 
According to the law of conservation of mass, the mass of reactants and products are equal.
Step-by-step explanation;
- Law of conservation of mass is a fundamental principle which states that matter cannot be created or destroyed in an isolated system. 
 - In chemical equations the law is observed such that the mass of the reactants is equal to the mass of the products. This is done by balancing chemical equations. 
 - A balanced equation is a chemical equation with the same number of atoms of each element on both sides of the equation. Balancing chemical equations ensures that the law of conservation of mass i observed.