How many molecules are contained in 0.650 g acetaminophen (C₈H₉NO₂)?

Question

Quizplus · Accepted Answer

To find the number of molecules, first calculate the molar mass of acetaminophen (C8H9NO2), which is approximately 151.16 g/mol. Then, convert 0.650 g to moles by dividing by the molar mass: 0.650 g / 151.16 g/mol ≈ 0.00430 mol. Finally, multiply by Avogadro's number (6.022 x 10^23 molecules/mol) to find the number of molecules: 0.00430 mol x 6.022 x 10^23 molecules/mol ≈ 2.59 x 10^21 molecules.

How Many Molecules Are Contained in 0