# difference between molecular mass and molar mass

by rubenhero
Tags: molar mass, mole concept, molecular mass
 P: 42 1. The problem statement, all variables and given/known data What is the difference between molecular mass and molar mass? Are they related? 2. Relevant equations moles = total mass/ mass/mole 3. The attempt at a solution I can't find any explanation in my lecture notes. I think that: molecular mass = mass of one molecule molar mass = mass of one mole of a molecule I think they are related by if i took the molecular mass and multiplied it by the number of moles, I would get the molar mass. Any help explaining these concepts is appreciated!
Admin
P: 21,675
 Quote by rubenhero molecular mass = mass of one molecule
Correct, but in what units?

 molar mass = mass of one mole of a molecule
Correct, but in what units?

 I think they are related by if i took the molecular mass and multiplied it by the number of moles, I would get the molar mass.
I guess you mean "number of molecules in a mole", not "number of moles". You are not wrong, but you are still missing one important factor. Again, think about units used for both molar and molecular mass.
 P: 216 Is molar mass not the same thing as mass of one mole of the substance in question?
Admin
P: 21,675

## difference between molecular mass and molar mass

 Quote by chikis Is molar mass not the same thing as mass of one mole of the substance in question?
Yes it is.

But without using correct units you will be still off.
P: 216
 Quote by Borek Yes it is. But without using correct units you will be still off.
If that is the case the unit will be gram per mole i.e gmol-1. How about that?
Is relative molecular mass the same as molecular mass?

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