The molecular formula of aspirin is C₉H₈O₄. How many aspirin molecules are present in one 500-milligram tablet A) 2.77 molecules B) 2.77 * 10^-3 molecules C) 1.67 * 10²⁴ molecules D) 1.67 * 10²¹ molecules E) None of these is correct.

Question

Quizplus · Accepted Answer

The molar mass of aspirin (C9H8O4) is approximately 180 g/mol. To find the number of molecules in a 500 mg (0.5 g) tablet, divide the mass by the molar mass to get moles, then multiply by Avogadro's number (6.022 x 10^23 molecules/mol). This calculation gives approximately 1.67 x 10^21 molecules.

The Molecular Formula of Aspirin Is C9H8O4

The Molecular Formula of Aspirin Is C₉H₈O₄