Question

The mass of two two-inch nail is 4.20g. Calculate the number of iron atoms in one two-inch nail

Answer 1

sry mate I don't know, plz forgive me

Answer 2

Number of atoms in one two-inch nail is $4.53\times 10^{22}$ .

Given :

Mass of two two-inch nail is 4.20 g .

Now , we know molar mass of iron is 55.845 gm .

We also know , one mole of iron contains Avogadro numbers of atoms i.e  $6.022\times 10^{23}$ atoms .

Therefore , number of atoms in two in nail is :

$n=\dfrac{4.20\times 6.022\times 10^{23}}{55.845}\\\\n=4.53\times 10^{22}$

Therefore , number of atoms in one two-inch nail is $4.53\times 10^{22}$ .

Hence , this is the required solution .

Learn More :

Avogadro Number

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