Final answer:
The molecular mass of ibuprofen (C13H18O2) is calculated by adding the atomic masses of its constituent atoms, resulting in a molecular mass of 206.28 amu. The solution concentration provided does not affect the calculation of molecular mass.
Step-by-step explanation:
The question pertains to the computation of the molecular mass of ibuprofen, which is a covalent compound and is the active pharmaceutical ingredient (API) in many over-the-counter pain medications. To calculate the molecular mass, you would sum the atomic masses (in atomic mass units, amu) of all the atoms in the ibuprofen molecule (C13H18O2).
To illustrate, carbon (C) has an atomic mass of approximately 12.01 amu, hydrogen (H) has an atomic mass of about 1.008 amu, and oxygen (O) has an atomic mass of roughly 16.00 amu. Therefore, the molecular mass of ibuprofen would be (13 * 12.01) + (18 * 1.008) + (2 * 16.00) = 206.28 amu. Note that the described solution containing ibuprofen in n-hexane with a concentration of 1.20 M simply indicates the amount of ibuprofen dissolved in the solvent to create a solution, which is unrelated to the computation of the molecular mass.