# One of the best-selling light, or low-calorie, beers is 4.2% alcohol by volume and a 12-oz serving contains 110 calories, to estimate the percentage of calories that comes from alcohol, consider the following questions.Write a balanced chemical equation for the reaction of ethanol with oxygen to make carbon dioxide and water.If 4.2% of total volume of ethanol and the density of ethanol is 0.789 g/mL, what mass of ethanol does a 12-oz serving of light beer contains?

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• One of the best-selling light, or low-calorie, beers is 4.2% alcohol by volume and a 12-oz serving contains 110 calories, to estimate the percentage of calories that comes from alcohol, consider the following questions.
1. Write a balanced chemical equation for the reaction of ethanol with oxygen to make carbon dioxide and water.
2. If 4.2% of total volume of ethanol and the density of ethanol is 0.789 g/mL, what mass of ethanol does a 12-oz serving of light beer contains?
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