Question

A typical small cup of coffee has 95 mg of caffeine (0.095 g). How many moles of caffeine is in the same cup? (caffeine has a molecular formula of C8H10N4O2)

Answer 1

There are approximately 0.000489 moles of caffeine in a typical small cup of coffee.

Step-by-step explanation:

To find the number of moles of caffeine in a cup of coffee, we need to use the molar mass of caffeine, which is 194.19 g/mol. We can use the following formula:

moles of caffeine = mass of caffeine / molar mass of caffeine

In this case, the mass of caffeine is 0.095 g. Substituting these values into the formula, we get:

moles of caffeine = 0.095 g / 194.19 g/mol

moles of caffeine = 0.000489 mol

Therefore, there are approximately 0.000489 moles of caffeine in a typical small cup of coffee.