Recall: The mass percent of an element is given by:
We're being asked to determine the mass percent of oxygen in vancomycin, with the molecular formula C66H75Cl2N9O24.
First, we need to determine the molar mass of vancomycin. We can do this by multiplying the atomic mass of each element with their corresponding number in the molecular formula:
Calculate the percentage by mass of oxygen in the following compounds.
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