determine which of these properties would distinguish these two substances: (a) boiling point; (b) combustion analysis results; (c) molecular weight;

i'm assuming that the correct answer is indeed the first one/ "a"..

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be

answerleaving cheese out to get moldy;