Nutrasweet is the brand name for the sweetener aspartame. this molecule is the ester of a dipeptide that contains the amino acids phenylalanine and aspartic acid. if aspartame is known to be 27.2% oxygen, by weight, and it has a molecular weight of 292g/mole, how many oxygen atoms must be found in each molecule of aspartame

The number of atoms of oxygen present in given amount of aspartame are

Explanation:

We are given:

27.2 % oxygen by mass

This means that 27.2 grams of oxygen is present in 100 grams of aspartame

Applying unitary method:

In 100 grams of aspartame, the mass of oxygen present is 27.2 grams

So, in 292 grams of aspartame, the mass of oxygen present will be =

To calculate the number of moles, we use the equation:

Given mass of oxygen = 79.42 g

Molar mass of oxygen = 16 g/mol

Putting values in above equation, we get:

According to mole concept:

1 mole of an element contains number of atoms

So, in 4.964 moles of oxygen will contain = number of atoms

Hence, the number of atoms of oxygen present in given amount of aspartame are