Answer:
7.52 × 10²³ Molecules of OCl₂
Step-by-step explanation:
As we know one mole of any substance contains 6.022 × 10²³ particles (atoms, ions, molecules or formula units). This number is also called as Avogadro's Number.
The relation between Moles, Number of Particles and Avogadro's Number is given as,
Number of Particles = Moles × 6.022 × 10²³
In given statement the particles are the molecules of Oxygen dichloride OCl₂ Hence,
Putting values,
Molecules of OCl₂ = 1.25 mol × 6.022 × 10²³ Molecules/mol
Molecules of OCl₂ = 7.52 × 10²³ Molecules