benzene and ethyne both have the same empirical formula of CH .if the mass of a mole of one of the compounds is 26 g, what is a possible mass of a mole other compound ?
2006-11-21 14:19:57 · 3 answers · asked by henry f 2 in Science & Mathematics ➔ Chemistry
The molecular formula of both compounds have the form CnHn, with n an integer greater than 1. n=1 is excluded as there exist no molecule CH. We can find n from the mass of a mole. A molar mass of 26 immediately gives n=2, as 26 = 2*(12+1). But given the information here, the other compound can have *any* molar mass of the for 13 *n, n greater than 1.
PS In reality benzene is C6H6, with a molar mass of 6*13=78
2006-11-23 21:10:53 · answer #1 · answered by cordefr 7 · 1⤊ 0⤋
26 g. If the Empirical formula is the same, then they both have the same Avogadro number of atoms per mole of each element, then they will have the same mass per mole.
I believe one is a cyclic and the other just a chain of hydrocarbon.
2006-11-21 22:30:32 · answer #2 · answered by Linda D 2 · 0⤊ 0⤋
the same ie 26 g
if they have the same empirical formula , each molecule has the same number of carbon and hydrogen, the difference is in the organization of the atomsin the molecules into different functional groups .
so one mole (avogadro number of molecules) of either would have the same weight.
2006-11-21 22:29:19 · answer #3 · answered by shogunly 5 · 0⤊ 0⤋