What is the difference between molecular mass and molar mass
Both are numerically same! Yeah, You have read it correct. ;-)
But yes there are two differences you should be aware of.
Difference 1. The Units
We generally use amu ( atomic mass unit) or u (unified mass) while talking about mass of atoms, molecules and ions.
On the other hand, We generally use gram (g) per mole when we talk about molar mass.
NOTE : 1 amu=1u = 1.67 * 10^24 g
Difference 2. The Meaning
Mass of an atom is called Atomic mass. And this is the mass of 1 atom of that element (like Hydrogen).
For example the mass of 1 atom of H is 1 amu.
Similarly, Molecular mass is the mass of one molecule of that kind.
For example Molecular mass of Ca(OH)2 is 74 amu.
Molar mass is the mass of 1 mole of molecules of that element.
For example, Molar mass of hydrogen is 1 g, This means that 1 mole of hydrogen atoms will have mass around 1 g.
Note: In many formulae,, you may find the following terms interchanged:Atomic mass , Molecular mass, Formula mass and Molar mass.For quick response, just remember that molar mass is atomic mass or molecular mass in grams.
Both are numerically same! Yeah, You have read it correct. ;-)
But yes there are two differences you should be aware of.
Difference 1. The Units
We generally use amu ( atomic mass unit) or u (unified mass) while talking about mass of atoms, molecules and ions.
On the other hand, We generally use gram (g) per mole when we talk about molar mass.
NOTE : 1 amu=1u = 1.67 * 10^24 g
Difference 2. The Meaning
Mass of an atom is called Atomic mass. And this is the mass of 1 atom of that element (like Hydrogen).
For example the mass of 1 atom of H is 1 amu.
Similarly, Molecular mass is the mass of one molecule of that kind.
For example Molecular mass of Ca(OH)2 is 74 amu.
Molar mass is the mass of 1 mole of molecules of that element.
For example, Molar mass of hydrogen is 1 g, This means that 1 mole of hydrogen atoms will have mass around 1 g.
Note: In many formulae,, you may find the following terms interchanged:Atomic mass , Molecular mass, Formula mass and Molar mass.For quick response, just remember that molar mass is atomic mass or molecular mass in grams.
