Calculate the molar mass of C8H9NO2

To calculate the molar mass of C₈H₉N O₂, we need to sum the molar masses of each element in the compound based on the number of atoms present.

• Carbon (C): 12.01 g/mol. There are 8 carbon atoms in the molecule.
• Hydrogen (H): 1.01 g/mol. There are 9 hydrogen atoms in the molecule.
• Nitrogen (N): 14.01 g/mol. There is 1 nitrogen atom in the molecule.
• Oxygen (O): 16.00 g/mol. There are 2 oxygen atoms in the molecule.

Now we calculate the total weight from each element:

• Carbon: 8 x 12.01 g/mol = 96.08 g/mol
• Hydrogen: 9 x 1.01 g/mol = 9.09 g/mol
• Nitrogen: 1 x 14.01 g/mol = 14.01 g/mol
• Oxygen: 2 x 16.00 g/mol = 32.00 g/mol

Adding all these together gives:

96.08 g/mol + 9.09 g/mol + 14.01 g/mol + 32.00 g/mol = 151.18 g/mol

Therefore, the molar mass of C₈H₉N O₂ is 151.18 g/mol.