The following data for an unknown vapor were obtained through the Dumas-bulb method:
Mass = 0.366 g
Volume = 355 mL
Pressure = 100 kPa
Temperature = 100°C
Determine the molar mass of the unknown vapor.

• A. 16.0 g/mol
• B. 44.0 g/mol
• C. 32.0 g/mol
• D. 58.0 g/mol

Answer: (C)