How many oxygen atoms are present in 23.6 grams of aspartame?

The formula of aspartame is C14H18N2O5.

From the periodic table:

molecular mass of hydrogen = 1 grams

molecular mass of carbon = 12 grams

molecular mass of nitrogen = 14 grams

molecular mass of oxygen = 16 grams

This means that:

molar mass of aspartame = 14 (12) + 18 (1) + 2 (14) + 5 (16) = 294 grams

Therefore, each 294 grams of aspartame contains 5 (16) = 80 grams of oxygen. To know number of grams of oxygen in 23.6 grams of aspartame, simply use cross multiplication as follows:

mass of oxygen = (23.6x80) / 294 = 6.42 grams