# Question #ea371

Aug 2, 2017

$15.05$ x ${10}^{23}$

#### Explanation:

No.of moles of Sulfur dioxide $= 1.25$

Formula of sulfur dioxide $= S {O}_{2}$

No.of Oxygen atoms present in 1 molecule of $S {O}_{2} = 2$

Moles of Oxygen atoms present in $S {O}_{2}$ = $2 \times 1.25$ $\implies$ $2.5$

No.of oxygen atoms $=$ Moles$\cdot$Avogadro's number

$= 2.5 \times 6.022 \times {10}^{23}$
$= 15.05 \times {10}^{23}$