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The mass of oxygen required to react with 7.6 g of ethanol is 5.3 g.Further ExplanationThis problem is a stoichiometric problem. To solve problems like this we always begin with the balanced equation. Then, we use the stoichiometric ratios provided by the coefficients of the reactants and products.1. Write the balanced chemical equation.CH₃CH₂OH + O₂ → H₂O + CH₃COOH2. Convert the mass of oxygen to moles.3. Determine the equivalent moles of oxygen that reacts with the given quantity of ethanol. The stoichiometric ratio for ethanol and oxygen indicated in the balanced chemical equation is 1:1.4. Convert the moles of O₂ to mass.The answer required should only have 2 significant digits. Therefore, the final answer is:Learn MoreLearn more about mole to particle conversionbrainly.com/question/12972204Learn more about stoichiometry and excessbrainly.com/question/12979299Keywords: stoichiometry, fermentation...