Equal masses of methane and oxygen are mixed in an empty container at `25^(@)C`. The fraction of the total pressure exerted by oxygen is:

Equal weights of methane and oxygen are mixed in an empty container at 25^(@)C . The fraction of the total pressure exerted by oxygen is

Equal weights of methane and oxygen are mixed in an empty container at 25^(@)C . The fraction of the total pressure exerted by oxygen is

Equal masses of methane and oxygen are mixed in an empty container at 25^(@)C . The fraction of total pressure exerted by oxygen is

Equal weights of methane and oxygen are mixed in an empty container at 25^(@)C . The fractin of the total pressure exerted by oxygen is

Equal weights of methane and oxygen are mixed in an empty container at 250C. The fraction of the total pressure exerted by oxygen is

Equal weights of methane and hydrogen are mixed in an empty container at 25^(@)C . The fraction of the total pressure exerted by hydrogen is