Consider the reaction at equilibrium: Mg(OH)2(aq) ←→ MgO(s) + H2O(ℓ) If you add more MgO to the system, how will the system respond? 1. the reaction will shift to the right 2. the reaction will shift to the left 3. nothing will happen 4. not enough information

2. the reaction will shift to the left

Explanation:

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By means of the Le Chatelier's principle, when adding a product, the inverse reaction is favored as the products are now considered as reactants, thus, since magnesium oxide is a product for the given chemical reaction, and in addition, it is being added, the equilibrium will shift leftwards, thus, the answer is:

2. the reaction will shift to the left

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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.