Final answer:
The percent composition of scopolamine is not determined directly by the options provided; it is obtained by calculating the molar mass of each element based on the molecular formula C17H21NO4, summing these to find the compound's molar mass, and then finding the percentage of each element.
Step-by-step explanation:
To calculate the percent composition of scopolamine, which has the molecular formula C17H21NO4, we must first determine the molar mass of each element in the compound and then the total molar mass of the compound. After that, we can find the percent composition of each element.
The molar masses of carbon (C), hydrogen (H), nitrogen (N), and oxygen (O) are approximately 12.01 g/mol, 1.01 g/mol, 14.01 g/mol, and 16.00 g/mol, respectively. Using these values, the molar mass of scopolamine is calculated as:
- (17 × 12.01 g/mol) for carbon
- (21 × 1.01 g/mol) for hydrogen
- (1 × 14.01 g/mol) for nitrogen
- (4 × 16.00 g/mol) for oxygen
Adding these together gives the total molar mass of scopolamine. To find the percent composition, you divide the mass of each element contributed by its atoms in the molecular formula by the total molar mass of the compound and multiply by 100%.
From this information and the reference analysis results provided, we can deduce the correct answer to the question is not among the options provided. The student is possibly mistaken in the analysis result. They should reassess their calculations, considering the molar mass and molecular formula of scopolamine.