If you are given the number of molecules in an unidentified chemical compound, can you calculate the number of moles in this sample?
A. yes, because you know that each mole contains 6.02 x 1023 molecules
B. yes, as long as you can also measure the mass of the sample
C. no, because the number of moles depends on the volume of the sample
D. no, because the number of moles depends on the identity of the substance

Question

If you are given the number of molecules in an unidentified chemical compound, can you calculate the number of moles in this sample? 
A. yes, because you know that each mole contains 6.02 x 1023 molecules
B. yes, as long as you can also measure the mass of the sample
C. no, because the number of moles depends on the volume of the sample
D. no, because the number of moles depends on the identity of the substance

jfraser · Answer

If I told you that there were exactly 36 bagels in a bag, can you tell me how many dozens are in the bag?  Number of molecules to number of moles works the exact same way