A mixture of ethylene and excess of `H_(2)` had a pressure of `600 mmHg` the mixture was passed over nickel catalyst to convert ethylene to ethane.The pressure of the resultant mixture at the similar conditions of temperature and volume dropped to `400 mm Hg` The fraction of `C_(2) H_(4)` by volume in the original mixture is

A mixture of ethylene and excess of H_2 has a pressure of 600 mm Hg. The mixture was passed over nickel catalyst to convert ethylene to ethane. The pressure of the resultant mixture at the similar condition of temperature and volume dropped to 400 mm Hg. the fraction of C_2H_4 by volume dropped to 400 mm Hg. The fraction of C_2H_4 by volume in the original mixture is:

Gaseous benzene reacts with hydrogen gas in presence of a nickel catalyst to form gaseous cyclohexane according to the reaction: C_(6)H_(6) (g) + 3H_(2) (h) rArr C_(6) H_(12) (g) A mixture of C_(6)H_(6) and excess H_(2) has a pressure of 60 mm of Hg in an unknown volume. After the gas has been passed over a nickel catalyst and all the benzene converted to cyclohexane, the pressure of the gas was 30 mm of Hg in the same volume and temperature. The fraction of C_(6)H_(6) (by volume) present in the original mixture is :

Gaseous benzene reacts with hydrogen gas in presence of a nickel catalyst to form gaseous cyclohexane according to the reaction: C_(6)H_(6) (g) + 3H_(2) (h) rArr C_(6) H_(12) (g) A mixture of C_(6)H_(6) and excess H_(2) has a pressure of 60 mm of Hg in an unknown volume. After the gas has been passed over a nickel catalyst and all the benzene converted to cyclohexane, the pressure of the gas was 30 mm of Hg in the same volume and temperature. The fraction of C_(6)H_(6) (by volume) present in the original mixture is :

Gaseous benzene reacts with hydrogen gas in presence of a nickel catalyst to form gaseous cyclohexane according to the reaction: C_(6)H_(6) (g) + 3H_(2) (h) rArr C_(6) H_(12) (g) A mixture of C_(6)H_(6) and excess H_(2) has a pressure of 60 mm of Hg in an unknown volume. After the gas has been passed over a nickel catalyst and all the benzene converted to cyclohexane, the pressure of the gas was 30 mm of Hg in the same volume and temperature. The fraction of C_(6)H_(6) (by volume) present in the original mixture is :

The total pressure of a mixture of H_(2) and O_(2) is 1.00 bar. The mixture is allowed to react to form water which is completely removed to leave only pure H_(2) at a pressure of 0.35 bar . Assuming ideal behaviour and that all pressure measurements were made under the same conditions of temperature and volume. The mole fraction of H_(2) in the original mixture is