Here's how to calculate the number of molecules of sulfur dioxide (SO₂) in 1.60 moles:

1. Avogadro's Number

* Avogadro's number tells us the number of particles (atoms, molecules, etc.) in one mole of a substance. It's approximately 6.022 x 10²³ particles/mol.

2. Calculation

* Multiply the number of moles by Avogadro's number:

1.60 moles SO₂ * (6.022 x 10²³ molecules SO₂ / 1 mol SO₂) = 9.635 x 10²³ molecules SO₂

Answer: There are approximately 9.635 x 10²³ molecules of sulfur dioxide in 1.60 moles.