J.R. S. answered 11/02/21
Ph.D. University Professor with 10+ years Tutoring Experience
If you know the empirical formula and thus the molar mass of the empirical formula, you simply find out how many of these fit into the molar mass of the molecular formula. In this problem, we have an empirical formula of CH4N so the molar mass is 12 + 4 + 14 = 30 g/mol. How many times does 30 go into 60.00? Two times. So the molecular formula is TWICE that of the empirical formula.
Molecular formula = C2H8N2