Question

A sealed flask contains 3.82 x 1024 molecules of CO, How many moles of Co, are in the flask?

Answer 1

if you meant 3.82* 10^24, the answer is 6.34551495 moles

if you meant 3.28*1024, the answer is 6.49780731*10^-21 moles

since you're going from molecules to moles, you need to divide by Avogadro's number which is 6.02*10^23