Molecular Formula from Percent Composition

The first step in identifying an unknown sample, we need to determine the empirical formula from percent composition. For an organic compound containing only C, H and O, the laboratory sent these results:
C 70.55 % H 10.66 % O 18.80 %
Enter the subscripts of the empirical formula. If one of the subscripts is 1, you must enter it here -- although this is not normal.
C 5 H 9 O 1 this is right

The next step is to determine the molecular formula from mass spectrum. The laboratory sent these res

Question

Molecular Formula from Percent Composition

The first step in identifying an unknown sample, we need to determine the empirical formula from percent composition. For an organic compound containing only C, H and O, the laboratory sent these results:
C 70.55 % H 10.66 % O 18.80 %
Enter the subscripts of the empirical formula. If one of the subscripts is 1, you must enter it here -- although this is not normal.
C 5	H 9	 O 1  this is right 


The next step is to determine the molecular formula from mass spectrum. The laboratory sent these res