To determine how many molecules are in 2.10 mol of CO₂, we use Avogadro’s number, which is 6.022 × 10²³ molecules per mole. This number represents the number of atoms, ions, or molecules in one mole of a substance.
The calculation is straightforward:
Number of molecules = Number of moles × Avogadro’s number
Plugging in the values:
Number of molecules = 2.10 mol × 6.022 × 10²³ molecules/mol
Number of molecules = 1.26462 × 10²⁴ molecules
Therefore, there are approximately 1.26 × 10²⁴ molecules in 2.10 mol of CO₂.