Question

Calculate the number of atoms in the following $0.26$ mole molecules of sulphur $\left(S_8\right)$.

Answer 1

$1$ mole of an atom contains $6\times {10}^{23}$ atoms

Here, mole of $S_8=0.26$

$0.26$ mole of an atom of $S$ in $S_8$

$=6.02\times {10}^{23}\times 0.26\times 8$

$\Rightarrow 12.5\times {10}^{23}$ atoms

$\Rightarrow 1.25\times {10}^{24}$ atoms