The average cup of coffee contains about 125 mg of caffeine, C8H10N4O2. Caffeine is also found in tea, colas, and headache remedies. What is the mass (in grams) of one molecule of caffeine?

The answer to your question is 194 g

Explanation:

Molecular mass is the sum of all the masses of the atoms that form a molecule.

In the problem, we have C₈H₁₀N₄O₂ which means

atomic mass number of atoms total

Carbon 12 8 12 x 8 = 96

Hydrogen 1 10 1 x 10 = 10

Nitrogen 14 4 14 x 4 = 56

Oxygen 16 2 16 x 2 = 32

194 g