Determine the number of molecules in 325 mg of aspirin, C₉H₈O₄.

Question

Quizplus · Accepted Answer

To find the number of molecules, first calculate the molar mass of aspirin (C9H8O4), which is 180 g/mol. Convert 325 mg to grams (0.325 g), then divide by the molar mass to find moles: 0.325 g / 180 g/mol = 1.81 × 10^-3 mol. Multiply by Avogadro's number (6.022 × 10^23 molecules/mol) to find the number of molecules: 1.81 × 10^-3 mol × 6.022 × 10^23 molecules/mol = 1.09 × 10^21 molecules.

Determine the Number of Molecules in 325 Mg of Aspirin