Answer:
The formula for ibuprofen is C13H18O2. Here's how we can calculate the molar mass and determine the number of moles in a typical dose of 0.800 grams:
1. Calculate the molar mass:
- To calculate the molar mass, we need to find the atomic masses of the elements in the formula and add them up.
- The atomic mass of carbon (C) is approximately 12.01 grams per mole (g/mol).
- The atomic mass of hydrogen (H) is approximately 1.01 g/mol.
- The atomic mass of oxygen (O) is approximately 16.00 g/mol.
Molar mass = (13 * 12.01 g/mol) + (18 * 1.01 g/mol) + (2 * 16.00 g/mol)
Molar mass = 156.13 g/mol
2. Calculate the number of moles:
- To find the number of moles, divide the mass of the substance by its molar mass.
- In this case, the mass is given as 0.800 grams.
Number of moles = 0.800 g / 156.13 g/mol
Number of moles ≈ 0.00512 mol
Therefore, in a typical dose of ibuprofen weighing about 0.800 grams, there are approximately 0.00512 moles of ibuprofen.
Step-by-step explanation: