Acetylene gas (C2H2) at 25 ºC, 1 atm enters a reactor operating at steady state and burns completely with 140% theoretical air entering at 400 K, 1 atm. If the products leave the reactor at 1200 K and assuming air has a molar analysis of 21% O2 and 79% N2, determine: a) air fuel ratio on mass basis, b) the mass fractions of products, c) the dew point temperature, d) heat transfer per kmol of fuel.

AS given that we have started with a solid powder on a glass plate which appears to be blackish yellow, on passing magnet the black particles separated.

so the black particles are magentic in nature. however the yellow portion of powder is not magnetic or diamagnetic

so its clear that we are able to separate the black and yellow portions by simple physical methods.

If we are able to separate any two substances by simple physical methods then it means that the powder is a mixture and not a compount