Answer: There are approximately 7.70176 × 10²³molecules of SO₂ in 1.28 moles of SO₂.
Step-by-step explanation:
To calculate the number of SO₂ molecules in 1.28 moles of SO₂, we need to use Avogadro's number
Avogadro's number = 6.022 × 10²³ molecules per mole.
First, we'll calculate the number of molecules in 1 mole of SO2:
1 mole of SO₂ = 6.022 × 10²³ molecules.
Then, we'll multiply this value by the number of moles of SO₂ given (1.28 moles):
Number of molecules = 1.28 moles × (6.022 × 10²³ molecules/mole)
Calculating this, we get:
Number of molecules = 7.70176 × 10²³molecules