Chemical reaction will occur if
1) the mass of the products is greater than the reactants
2) the products are more stable than the reactants
3) the products are the same stability as the reactants
4)the products are less stable than the reactants

The answer to your question is:

Explanation:

1) the mass of the products is greater than the reactants The mass does not affect that a reaction occurs or not because if there is less quantity of a reactant only will react the proportion. This answer is incorrect.

2) the products are more stable than the reactants  This answer is correct, if products are more stable than reactants, then the reaction happens.

3) the products are the same stability as the reactants  The both products and reactants have the same stability, the reaction is reversible, then this answer is incorrect.

4)the products are less stable than the reactants if products are less stable than reactants, the reaction does not happen. This option is incorrect.

true

hope that