Numerical value of mole [closed]








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Why is the numerical value of a mole of atoms equal to the atomic weight? For example, hydrogen has an atomic weight of 1.008, so 1 mole of hydrogen atoms has a molar mass of 1.008 g/mol. Why?




If i assumed your question right here is the answer.


1 mole=6.022\*10^23 particles (its not any unit of mass)


atomic mass of atoms are often expressed in a unit called amu.


1 amu=1.6605\*10^(-24) gram (more significant figures are there) 


according to your question 


mass of 1 hydrogen atom is 1.008 amu


= 1.008\*1.6605\*10^(-24) = 1.6737\*10^(-24) gram


for 1 mole particles


mass =1.6737\*10^(-24) \* 6.022\*10^(23) = 1.0079 g/mol (approximately 1.008)


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