A Sample of an Unknown Volatile Liquid Was Injected into a Dumas

Multiple Choice

A sample of an unknown volatile liquid was injected into a Dumas flask m_flask = 27.0928 g, v_flask = 0.1040 L) and heated until no visible traces of the liquid could be found. The flask and its contents were then rapidly cooled and reweighed (m_{flask + vapor} = 27.4593 g) . The atmospheric pressure and temperature during the experiment were 0.976 atm and 18.0 °C, respectively. The unknown volatile liquid was ________.

A) C₆H₁₂
B) C₆H₁₄
C) C₇H₁₄
D) C₇H₁₆
E) C₆H₆