Empirical and Molecular Formulas in Physics Chemistry: Calculation Steps and Examples, Exercises of Chemistry

Download Empirical and Molecular Formulas in Physics Chemistry: Calculation Steps and Examples and more Exercises Chemistry in PDF only on Docsity! SUBJECT: CHEMISTRY COURSE: PHYSICSL CHEMISTRY COLLEGE: BASIC DEFINITION AND NUMERICALS EMPIRICAL AND MOLECULAR FORMULA EMPERICAL FORMULA: A formula of the substance which shows the relative number of combing of atoms. It is also called the simplest formula or stoichiometric formula. MOLECUALAR FORMULA: Molecular formula shows the total number and kind of atom present in a molecule. Molecular formula generally associated with covalent compound because they exist in discrete molecules. COMPOUNDS EMPERICAL FORMULA MOLECULAR FORMULA Glucose C1H2O1 C6H12O6 Benzene C1H1 C6H6 Vinegar C1H2O1 C2H4O2 The relation between empirical and molecular formula can be expressed as: Molecular formula= (Empirical formula) n. Where “n” is the ratio between empirical formula mass and molecular mass. STEPS TO FIND EMPERICAL FORMULA Following are the steps to solve for the empirical formula. Remember every step is connected to previous step. STEP # 1: Percentage composition = Atomicmass of element∗massof the respectivecompound molecularmassof the respectivecompound∗massof the sample ∗100 SUBJECT: CHEMISTRY TYPE: EXPLANATION & NUMERIALS