1. Calculate the molar mass of HCl:
* Hydrogen (H) has a molar mass of 1.008 g/mol.
* Chlorine (Cl) has a molar mass of 35.45 g/mol.
* Molar mass of HCl = 1.008 g/mol + 35.45 g/mol = 36.458 g/mol
2. Calculate the number of moles of HCl:
* moles = mass / molar mass
* moles = 100 g / 36.458 g/mol
* moles ≈ 2.74 mol
3. Use Avogadro's number to find the number of molecules:
* Avogadro's number: 6.022 x 10^23 molecules/mol
* Number of molecules = moles x Avogadro's number
* Number of molecules ≈ 2.74 mol x 6.022 x 10^23 molecules/mol
* Number of molecules ≈ 1.65 x 10^24 molecules
Therefore, there would be approximately 1.65 x 10^24 molecules of hydrogen chloride in 100 grams of the gas.
