The molecular weight of ethanol (CHgCHzOH) is 46 and its density is 0.789 g/cm3. A. \A4rat is the molarity of ethanol in beer that is 5% ethanol by volume? [Alcohol content of beer varies from about 4Vo (lite beer) to B% (stout beer).1

Explanation:

Hello,

In this case, one must consider that the ethanol's concentration in beer is defined as:

In such a way, since molarity is defined as:

One is asked to compute the moles, considering a basis of 5 milliliters of ethanol and 100 milliliters of beer, thus:

Now, the volume in molarity is required in liters, therefore:

Therefore, the molarity turns out:

Best regards.