# Problem: One of the best-selling light, or low-calorie, beers is 4.4 % alcohol by volume and a 12-oz serving contains 110 Calories; remember: 1 Calorie = 1000 cal = 1 kcal. To estimate the percentage of Calories that comes from the alcohol, consider the following questions.    If 4.4 % of the total volume is ethanol and the density of ethanol is 0.789 g/mL, what mass of ethanol does a 12-oz serving of light beer contain?

###### FREE Expert Solution

We’re being asked to calculate the mass of ethanol in a 12-oz serving of light beer which contains 4.4 % ethanol by volume given its density.

Recall that we can solve for the volume percent using the equation:

This means, that the % by volume ethanol in light beer (solution) is given by the equation:

We can determine the mass of ethanol by using its density after finding its volume in light beer.

volume ethanol (density) → mass ethanol

89% (138 ratings) ###### Problem Details

One of the best-selling light, or low-calorie, beers is 4.4 % alcohol by volume and a 12-oz serving contains 110 Calories; remember: 1 Calorie = 1000 cal = 1 kcal. To estimate the percentage of Calories that comes from the alcohol, consider the following questions.

If 4.4 % of the total volume is ethanol and the density of ethanol is 0.789 g/mL, what mass of ethanol does a 12-oz serving of light beer contain?