Can the number of moles be a ratio of mass percentage and molecular mass? [closed]








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I recently started studying mole concept and came across this formula,
$$ n=\frac{\text{mass percentage}}{\text{molecular mass}}$$


I don't know how it came into existence. How does this formula work?




The exact formula is : $n = \ce{\frac{mass}{molar mass}}$. It is not : $n = \ce{\frac{mass percentage}{molar mass}}$, as written in your text. "My" formula can be checked by dimension analysis. The mass is expressed in grams. The molar mass is expressed in gram per mole. The unit of ratio $n$ by "my" formula is expressed in $\ce{\frac{gram}{g/mol} = mol}$. And, of course, the mole is the unit of amount of matter (what you call "number of moles")


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