Final answer:
To calculate the number of moles, divide the mass of fluorine by its molar mass.
Step-by-step explanation:
To calculate the number of moles, we need to use the formula:
moles = mass / molar mass
Given that the mass of fluorine is 73g and the molar mass of fluorine is approximately 19g/mol, we can calculate:
moles = 73g / 19g/mol = 3.84 moles of fluorine