Aspirin is a compound that contains carbon, hydrogen, and oxygen. It is used as a painkiller. An aspirin tablet contains 25 x 1030 molecules. How many moles of this compound are present in the tablet?

Question

Accepted Answer

Solution:

Number of molecules = 1.25 x 10³⁰molecules

Avogadro's number = N_A = 6.022 x 10²³

Number of moles = ?

Number of moles = $\frac{ ext{Number of molecules}}{N_{A}}$

Number of moles = $\frac{1.25 imes10^{30}}{6.022 imes10^{23}}$

Number of moles = 0.2076 x 10^30-23

Number of moles = 0.2076 x 10⁷

Number of moles = 2.076 x 10⁶ moles