Question

How many moles of tungsten are in 1.05 * 10^24 atoms of tungsten?

Answer 1

1.74 moles

Explanation:

A mole of a substance is defined as:  

The mass of substance containing the same number of fundamental units as there are atoms in exactly 12.000 g of $^{12}C$.

Any substance has $6.022\times 10^{23}$ atoms in one mole of that substance.

$\text{Number of moles}=\frac{\text{given number of atoms}}{6.022\times 10^{23}}$

Given number of atoms are $1.05\times 10^{24}$

So,$\text{Number of moles}=\frac{1.05\times 10^{24}}{6.022\times 10^{23}}$=$1.74$ moles