PPT-Empirical and Molecular Formulae

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. . 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. July 2011. Subject Content = Covered. We are working on applications. Multistep and practical problems. 3 Dimensional problems. Setting out the steps in a logical and clear manner, which may include drawing triangles. August 2011. Pythagoras c. 2. = a. 2. + b. 2 . where c is the hypotenuse = the longest side. Pythagoras. . c. 2. = a. 2. + b. 2 . . so c = (a. 2. + b. 2 . )^0.5. a. 2. = c. 2. - b. 2 . . Datang. 欢. 迎. Vaazhga. Welcome. Professor David Wray. University of Warwick,. United Kingdom. Dr Dahlia . Janan. Universiti. . Pendidikan. Sultan . Idris. , Malaysia. Many thanks for coming to today’s meeting. Objectives. To learn how to write formulae for compounds. Outcome: you should be able to write the formulae for inorganic covalent compounds and ionic compounds comprising single atom ions or polyatomic ions.. Objectives. To learn how to work out the percentage composition by weight of a compound. To use percentage composition to work out empirical formulae. Percentage compositions. This means what percentage of each element is present in a compound, and therefore tells you what masses of each element are present in any given mass of a compound. . How can conjectural variation models help?. Alan Crawford and . Benoît. Durand. OFT Seminar. The questions. Can we use conjectural variation models to . measure empirically market power?. identify the source of market power? Can we use conjectural variation models to tell whether market power is the result of product differentiation or collusion? . 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. Can you place the numbers 1-8, one in each box, so that no two consecutive numbers touch?. Rearranging Formulae and Simultaneous Equations 8-11-16 . For the formula . 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. Due at end of Period. The compound . benzamide. has the following percent composition. What is the empirical formula? . C . = 69.40 % H= 5.825 % O = 13.21 % N= 11.57 % . 2. A . component of protein called serine has an approximate . Objectives:. -         . The student will determine an empirical, or simplest, formula from percentage composition data..  . PA Science and Technology Standards: 3.4.10.A; 3.4.12.A. PA Mathematics Standards: 2.2.11.A, 2.3.11.C, 2.4.11.E, 2.5.11.A. 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.