Question

Equal weights of ethane and hydrogen are mixed in an empty container at . The fraction of the total pressure exerted by hydrogen is

• A. 1 : 2
• B. 1 : 1
• C. 1 : 16
• D. 15 : 16

Answer 1

Answer: (D)

15 : 16

Answer 2

$n \left( C _ { 2 } H _ { 6 } \right) = \frac { w } { 30 } , n \left( H _ { 2 } \right) = \frac { w } { 2 }$

$p \left( H _ { 2 } \right) = \frac { w / 2 } { w / 2 + w / 30 } = \frac { 1 } { 1 + \frac { 1 } { 15 } } = \frac { 15 } { 16 }$