Which step would a student find the molecular formula of a compound from the empirical formula?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.