How many aspirin molecules are present in a 0.325 g sample of aspirin? [Molar mass: aspirin,180.2 g/mol]

Question

Quizplus · Accepted Answer

To find the number of aspirin molecules, first calculate the number of moles of aspirin using its molar mass: $0.325 \, \text{g} \div 180.2 \, \text{g/mol} = 1.80 \times 10^{-3} \, \text{moles}$. Then, multiply by Avogadro's number ($6.022 \times 10^{23} \, \text{molecules/mole}$) to find the number of molecules: $1.80 \times 10^{-3} \, \text{moles} \times 6.022 \times 10^{23} \, \text{molecules/mole} = 1.09 \times 10^{21} \, \text{molecules}$.

How Many Aspirin Molecules Are Present in a 0