যদি নিম্নোক্ত গ্যাসগুলোর ভর একই হয় তবে কোনটিতে সর্বাপেক্ষা কম সংখ্যক অণু আছে?

The provided answer, $C{l}_2$, is correct because it has the highest molar mass among the given options. When considering the same mass of different gases, the number of molecules present is inversely related to their molar mass. This means that as the molar mass increases, the number of molecules decreases for the same mass.

To clarify:

  
• Argon (Ar) has a molar mass of approximately 40 g/mol.
  
• Chlorine (Cl₂) has a molar mass of approximately 71 g/mol.
  
• Carbon monoxide (CO) has a molar mass of approximately 28 g/mol.
  
• Sulfur dioxide (SO₂) has a molar mass of approximately 64 g/mol.

Among these, chlorine has the highest molar mass, meaning that for the same mass, it contains the fewest number of molecules. Therefore, the answer correctly identifies Chlorine (Cl₂) as the gas with the least number of molecules when all have the same mass.

AI-এর ব্যাখ্যায় ভুল থাকতে পারে।