Question

C3H2N, 208.17g/mol molecular formula?

Answer 1

First you need to find the molecular mass of C3H2N.

C*3 = 36.03g
+H*2 = 2.02g
+N = 14.01g

= 52.05g/mol

Now you just divide the molecular mass of the molecular formula, which is given, by the molar mass which we just found.

\[\frac{208.17g/mol}{52.05g/mol} \approx 4\]

Now you just multiply each of the subscripts of the empirical formula by the 4 we just got.

C3H2N * 4
= C12H8N4

C12H8N4 would be the molecular formula.