Final answer:
The arrow in a chemical equation represents the direction of the reaction from reactants to products. In this equation, 2H₂O₂ → 2H₂O + O₂, the arrow indicates the formation of 2 molecules of water and 1 molecule of oxygen gas from the decomposition of 2 molecules of hydrogen peroxide.
Step-by-step explanation:
The arrow in a chemical equation, represented by the symbol →, separates the reactants from the products and shows the direction in which the reaction proceeds. It indicates the transformation of reactants into products. In the given equation 2H₂O₂ → 2H₂O + O₂, the arrow shows that 2 molecules of hydrogen peroxide decompose to form 2 molecules of water and 1 molecule of oxygen gas.