PPT-Empirical Formulas Empirical Formula:

Lowest whole ratio H 2 O 2 hydrogen peroxide is it a empirical Formula No you can reduce it to HO H 2 O 2 is the molecular formula Molecular formula shows the way the molecule is actually found in nature. . vs. . Empirical Formula. Different compounds can have the . same. empirical formula. but . different. molecular formulas. .. Empirical . Formula is a . reduced. . form of Molecular formula . Molecular Formula and Empirical Formula. Molecular Formulas. Let’s use those mole conversions!. Empirical formula . tells you the lowest ratio of atoms within a molecule. Molecular formula . tells you the actual ratio of atoms within a molecule. Get started. Imagine that Excel is open and you’re looking at the “Entertainment” section of a household expense budget.. Cell C6 in the worksheet is empty; the amount spent for CDs in February hasn’t been entered yet.. Percent Composition. . Percent Composition – . the percentage by mass of each element in a compound . Percent =. _______. Part. Whole. x 100%. So…. Percent composition. of a compound or =. molecule. Simple Ionic Compounds. Concept:. Ionic Formulas are formed from positive and negative ions.. Fact 1:. Positive ions are formed by metals that lost electrons.. Examples: Na. 1+. Mg. 2+. A. 3+. 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. Seating Chart. Warm Up 1/5-6. Imagine your boss wants you to count the number of Styrofoam packing peanuts in a large bag. Suppose you found the mass of 100 peanuts to be 5.5 g. How could you use this to find the number of peanuts in the bag?. Recognize that chemical formulas are used to identify substances and determine the number of atoms of each element in chemical formulas containing subscripts.. Recognize whether a chemical equation containing coefficients is balanced or not and how that relates to the law of conservation of mass.. Microsoft Office 2010 Fundamentals. 1. Introduction. 2. The real power of a spreadsheet program such as Excel is its ability to perform simple and complex calculations on worksheet data.. Using the commands located on the Formulas tab of the Ribbon, you can enter formulas to perform calculations or use predefined formulas, called functions.. Kylia Crane, RDN, LD. Nutrition Coordinator. Georgia Chapter-American Academy of Pediatrics. kcrane@gaaap.org. 404.881.5093. Infant Formula Algorithm 2012. Created by Stanley Cohen, MD - Pediatric Gastroenterologist (This project is a part of a contractual agreement between GA WIC and GA AAP- funded by GA WIC). Naming Ionic Compounds. The names of ionic compounds consists of the names of the ions that make up the compound.. Names of . cations. include the elements of which they are composed.. Names of anions are altered names of elements.. 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. Percent Composition. Breaks down the amount of an element in a compound by percentage. Total mass of element / total mass of compound. Result will always be a decimal. Multiply by 100 to get the final percentage. Percent Composition. ~percent by mass of atoms present in a compound. = (mass of atom). . (total molar mass) x 100. water is . 88.81 . % Oxygen and . 11.19 . % Hydrogen. O- 16.00/18.016 x 100 = . 88.81 .