Question

Calculate the no. Of moles of iron in a sample containing 10^22 atoms of iron.

Answer 1

1 mole of iron = 6.02 * 10^23 atoms

10^22 atoms of iron = 10^22/6.02 * 10^23

 = 1/60.2

= 0.0166 moles.

Number of moles = 0.0166 moles.

Answer 2

The mass of given number of atoms of iron is 0.93 g

Explanation:

We are given:

Number of atoms of iron = $10^{22}$

According to mole concept:

1 mole of an element or compound contains $6.022\time 10^{23}$  number of particles.

Molar mass of iron = 56 g/mol

As, $6.022\time 10^{23}$ number of atoms of iron has a mass of 56 grams

Then, $10^{22}$ number of atoms of iron will have a mass of = $\frac{56}{6.022\times 10^{23}}\times 10^{22}=0.93g$

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