. Sort the molecular compounds in the table into groups with the same empirical chemical formula That is, select Group 1 next to all the compounds with the first empirical formula. (If all four compounds have the same empirical formula, then they'll all end up in Group 1) Next, select Group 2 next to all the compounds with the second empirical formula. And so on. If all four compounds have different empirical formulas, then they'll each end up alone in their own group: Compound A will be alone in Group 1, Compound B will be alone in Group 2, and so on. About the sketches: the lines stand for chemical bonds between the atoms. Just ignore the dots. They stand for "lone pairs,' and you'll learn about them later. You don't need to know anything about lone pairs to solve this problem compound sketch of molecules in it group $ ? H H H H 20 H- - H--- c- H A :O: HO: (Choose one) H H