1.

Calculate the mass of one mole of electron of 55mg

Answer»

As we know that

1Kg=1061Kg=106mgMass of an electron = 9.1×10−319.1×10−31Kg 
=9.1×10−25mg.9.1×10−25mg.
Next,number of electrons(X) PRESENT in 0.55 mg :
0.55/(9.1×10−25)=0.604×10240.55/(9.1×10−25)=0.604×1024
Further ;
no of MOLES (n) = X/NX/N 
 N is Avogadro's constant .
=n=0.604×1024/(6.023×1023)=1.0034793.=n=0.604×1024/(6.023×1023)=1.0034793.
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