Final answer:
To find the mass % of acetic acid in the analyte, divide the mass of acetic acid by the total mass of the analyte and multiply by 100%. In this case, it is determined to be 16.73%.
Step-by-step explanation:
To calculate the mass % of acetic acid in the analyte, we need to know the mass of acetic acid and the total mass of the analyte. In this case, the mass of the analyte is given as 10.40 grams. Now, we need to find the mass of acetic acid in the analyte.
The molar mass of acetic acid (CH3COOH) is 60.05 g/mol. Since the molar mass is given in grams per mole, we can directly convert the mass of acetic acid to moles by dividing it by the molar mass.
moles = mass / molar mass = 10.40 g / 60.05 g/mol = 0.1732 mol
Now, to calculate the mass % of acetic acid in the analyte, we can use the following formula:
mass % = (mass of acetic acid / mass of analyte) x 100%
mass % = (0.1732 mol x 60.05 g/mol / 10.40 g) x 100% = 16.73%