PPT-1. Define - Formula mass

Atomic Mass Empirical formula Yield CC9 Calculating Involving Masses p2630 1 O 2 C 3Mg 4Ca 5N 4 Empirical formula the simplest ratio of atoms in a . Q- a compound is found to contain the following % by mass: 69.58% Ba, 6.090% C, 24.32% O. What is the simplest (i.e. empirical) formula?. Step 1. : imagine that you have 100 g of the substance. Thus, % will become mass in grams. E.g. 69.58 % Ba becomes 69.58 g Ba. (Some questions. You should know this for the quiz!. Empirical and Molecular Formulae. Empirical Formula. If needed, change % to g.. Do . a molar conversion to change from . g. mol. Divide each of these numbers by the smallest number. vs.. Gram Formula Mass. AMUs . vs. Grams. Aim: . How can we find the . formula mass . and . gram formula mass . of a compound?. Essential Questions:. How can we find the formula mass and gram formula mass of a compound?. = based on data. . Usually % composition data. Why is it important to be able to calculate the empirical formula?. Penicillin . Antibiotic. Discovered about 80 years ago. Paved the way for other antibiotics to be created which increased life expectancy. . Chemical . Reactions and. . Reaction . Stoichiometry. James F. Kirby. Quinnipiac University. Hamden, CT. Lecture Presentation. Stoichiometry. The study of the mass relationships in chemistry. Based on the Law of Conservation of Mass (Antoine Lavoisier, 1789). . - . hydrates. Dr. Chin Chu. Chemistry. River Dell High School. Definition:. Hydrates in Inorganic Chemistry – are inorganic salts “containing water molecules combined in a definite ratio as an integral part of the salt crystal that are either bound to a metal center or that have crystallized with the metal complex.. Represents the . actual. number of . atoms. of each . element. in . compound. Not necessary for . ionic compounds. Necessary for . covalent compounds. The molecular formula for water is . H. 2. O. Lecture Presentation. Chapter 3. Molecules, Compounds, and Chemical Equations. How Many Different Substances Exist? . Elements combine with each other to form . compounds. . . The great diversity of substances that we find in nature is a direct result of the ability of elements to form compounds. . Why Study Chemistry?. . Think about current issues in the news.. . . . . . . 2. Why Study Chemistry?. . Think about current issues in the news.. Energy sources. . . THE MOLE. Mole. -The . number of C atoms in exactly 12.0 g of carbon., also a number 6.022 x 10. 23. Avogadro’s number . 6.022 x 10. 23. , the number of . particles. in a mole of . anything. More on the mole later……. Stoichiometry. Mass and Moles of a Substance. Chemistry requires a method for determining the numbers of molecules in a given mass of a substance. . which has lead to the development of the . mole. (quantity of substance to be discussed later).. Mr. Guerrero. Stoichiometry. Homework, due on the day of chapter exam. . Zumdahl. Text, 9. th. ed. . page 126: . #10, 13, 18, 38, 40, 46, 50, 66, 74, 84, 86, 88, 100, 106, 122, 124, 126.. Write out all conceptual(non-math) questions & answer in complete sentences.. Composition of Substances and Solutions Atomic Mass and Formula Mass; Mole & Molar Mass; Percent Composition of Compounds; Determination of Empirical & Molecular Formulas; Molarity Other Units for Solution Concentrations Determining Molecular Formulas. Calculate the molecular formula of a compound whose molar mass is 60.0 g/mol and has an empirical formula of CH4N.. What you need:. Empirical Formula. Molar Mass. Calculate the molar mass of the empirical formula.