a)A 10.0 g sample of a mixture of methane (CH4) and ethane (C2H4) reacts with oxygen at 25C and 1 atm to produce carbon dioxide and water (liquid). If the reaction produces 520 kJ of heat, what is the mass percentage of methane in the mixture?
b)A mixture of argon and neon gases at 77C contains twice as many moles of neon as of argon. The mixture has a total mass of 50.0 g. If the density of the mixture is 4.00g/L, what is the partial pressure of the neon gas?
c)What will the final temperature be, of a mixture made from equal masses of the following: water at 25.0C, ethanol at 35.5C and iron at 95.0C?