Equal moles via atomic masses for same atom count

Steps:

• Atomic mass of sulfur is 32 g/mol; moles in 16 g = 16 / 32 = 0.5 mol.
• Same atom number requires 0.5 mol of carbon.
• Atomic mass of carbon is 12 g/mol; mass = 0.5 mol × 12 g/mol = 6 g.
• Thus, 6 g carbon matches atoms in 16 g sulfur.

Why B is correct:

• 6 g carbon equals 0.5 mol (6/12), same as 0.5 mol sulfur (16/32), so equal atoms per Avogadro's number.

Why the others are wrong:

• A: 0.5 g carbon = 0.0417 mol (0.5/12), fewer atoms than 0.5 mol sulfur.
• C: 8 g carbon ≈ 0.667 mol (8/12), more atoms than 0.5 mol sulfur.
• D: 12 g carbon = 1 mol (12/12), twice the atoms of 0.5 mol sulfur.

Final answer: B