Question

a pure silver ring contains 2.60 *10^22 silver atoms. How many moles of silver atoms does it contain?

Answer 1

Answer: The given number of atoms is contained in 0.0432 moles.

Explanation:

We are given:

Number of silver atoms = $2.60\times 10^{22}$

According to mole concept:

$6.022\times 10^{23}$ number of atoms are contained by 1 mole of element

So, $2.60\times 10^{22}$ number of atoms will be contained in = $\frac{1}{6.022\times 10^{23}}\times 2.60\times 10^{22}=0.0432mol$ of silver.

Hence, the given number of atoms is contained in 0.0432 moles.

Answer 2

Moles of silver = 2.6 x 10^22/6.02 x 10^23 = 0.043 moles. 

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