In an oxygen molecule, the two oxygen atoms are held together by a double bond with a bond energy of 495 kj/mol. using the balanced chemical equation (shown above), how much energy must be expended in breaking the o=o bonds?

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

According to the tide table below what time of day will the highest tide occur? (2 pt) the highest tide will occur at

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride