What is the molecular formula of each compound if the empirical formula is CH and the actual molar mass of compound is 78 g/mole?

1 Answer
Mar 2, 2018

The molecular formula is C_6H_6.

Explanation:

First, calculate the molar mass of the empirical formula, CH by adding the molar mass of carbon and hydrogen.

12 + 1 = 13color(white)(l)g/molcolor(white)(l)CH

Now, divide the molar mass of the molecular compound (actual molar mass) by the molar mass of CH to see how many times more massive the actual compound is.

78/13=6 times more massive

After multiplying each atom in the empirical formula by 6, we know the molecular formula is C_6H_6.