A gaseous fuel mixture stored at 747 mmHg and 298 K contains only methane (CH4) and propane (C3H8). When 11.1 L of this fuel mixture is burned, it produces 780 kJ of heat. What is the mole fraction of methane in the mixture

Explanation:

From the question we are told that:

Pressure

Temperature

Volume

Heat Produced

Generally the equation for ideal gas is mathematically given by

Therefore

Since

Heat of combustion of Methane=889 kJ/mol

Heat of combustion of Propane=2220 kJ/mol

Therefore

Comparing Equation 1 and 2 and solving simultaneously

Therefore

Mole fraction 0f Methane is mathematically given as

the answer is c i believe

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.