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/mole.
2. Calculation
* To find the number of molecules in 0.65 moles of SO₂, we'll use the following formula:
* Number of molecules = (moles of substance) * (Avogadro's number)
* Plugging in the values:
* Number of molecules = (0.65 moles) * (6.022 x 10²³ molecules/mole)
* Number of molecules ≈ 3.91 x 10²³ molecules
Therefore, there are approximately 3.91 x 10²³ molecules of sulfur dioxide in 0.65 moles.
