Given the molar mass of the compound is 186.5 g and the empirical formula is C2H7, what is its molecular formula?

1 Answer
Nov 3, 2015

Answer:

The molecular formula is always a multiple of the empirical formula.

Explanation:

So #(EF)_n = MF#. All we have to do is solve for #n#.

i.e. #(2xx12.011 + 7 xx 1.00794)_n*g*mol^(-1) = 186.5*g*mol^(-1)#. So solve for #n#, and then do the product #(C_2H_7) xx n# to give the molecular formula. Please repost the answer here.