What is the molecular formula of each compound? (Type your answer using the format C6H12O6 for C6H12O6 and use the same order of the elements as in the empirical formulas.) (a) empirical formula HgCl ( = 472.1 g/mol) (b) empirical formula CHCl ( = 96.94 g/mol) (c) empirical formula NO2 ( = 92.02 g/mol) (d) empirical formula CH2Cl ( = 98.95 g/mol)