To determine the number of molecules in 4.00 moles of hydrogen sulfide (H₂S), we can use Avogadro’s number. Avogadro’s number is approximately 6.022 x 10²³, which tells us how many molecules are in one mole of any substance.
Here’s how the calculation works:
- Number of moles of H₂S = 4.00 moles
- Using Avogadro’s number: 1 mole = 6.022 x 10²³ molecules
Now, we can calculate the total number of molecules:
Total number of molecules = Number of moles × Avogadro’s number
Total number of molecules = 4.00 moles × 6.022 x 10²³ molecules/mole
Total number of molecules = 2.409 × 10²⁴ molecules
Therefore, in 4.00 moles of H₂S, there are approximately 2.41 x 10²⁴ molecules. This high number reflects how the scale of molecules operates on the atomic level, where even a small amount of substance can contain an enormous number of molecules.