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Question

Calculate the number of atoms present in 5.6 g of iron(Fe).


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Solution

Numberofmoles=GivenmassingMolarmass(g/mol)=5.656=0.1moleNumberofatoms=Numberofmoles×Avogadro'snumber=0.1×6.022×1023=6.022×1022atomsTherefore,thenumberofatomspresentin5.6gofiron(Fe)are6.022×1022atoms.


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