The formula for ibuprofen is C13H18O2. How many moles of ibuprofen are present in a 200.0mg tablet.
Can you please show me the set up?
To calculate the number of moles of ibuprofen present in a 200.0mg tablet, we need to use the formula:
Number of moles (n) = mass (m) / molar mass (M)
First, let's calculate the molar mass (M) of ibuprofen. The molar mass is obtained by adding up the atomic masses of each element in the formula.
The atomic masses of carbon (C), hydrogen (H), and oxygen (O) are:
- Carbon (C): 12.01 g/mol
- Hydrogen (H): 1.008 g/mol
- Oxygen (O): 16.00 g/mol
Now, let's calculate the molar mass (M) of ibuprofen:
Molar mass (M) = (12.01 g/mol * 13) + (1.008 g/mol * 18) + (16.00 g/mol * 2)
M = 156.27 g/mol
Now that we know the molar mass (M) of ibuprofen is 156.27 g/mol, we can calculate the number of moles (n) in the tablet:
n = 200.0 mg / 156.27 g/mol
n ≈ 1.28 x 10^-3 mol
Therefore, there are approximately 1.28 x 10^-3 moles of ibuprofen present in a 200.0mg tablet.