Molecular Formula of acetylene = C2H2
Empirical formula = CH
Molar mass = 26.04
Molecular formula =?
1. Determine the Empirical formula weight.
Empirical formula weight = (1 x 12.01g/mol) + (1 x 1.01g/mol) = 13.02 g/mol
2. Divide the molar mass for the molecular formula by the empirical formula mass. The result determines how many times to multiply the subscripts in the empirical formula to get the molecular formula.
The molar mass of this compound is 26.04g/mol
Number of moles = mass/molar mass
26.04/13.02 = 2
Multiply empirical formula with number of moles to get the molecular formula.
CH x 2 = C2H2
The Molecular formula of acetylene is = C2H2
