Alloy SS304 is immersed in an aqueous solution pH=4.9 containing 25wt% of chrome dioxide, CrO2, from the magnetic tape process. Please identify the predominant oxidation reaction and the predominant oxidizer when the solution is aerated using a blend of N2 and O2 containing 0.75 molar %O2. List the reaction mechanism and justify the selection of predominant oxidation reaction and oxidizer to determine the spontaneity of the reaction. Cr molecular weight is 52gr/mol