PPT-Percentage Composition

Lesson 28 Warm up Submit Mole Conversion packages in basket and copy the following upon arrival WritePairShare What is the percent of the total composition of each ingredient in the following recipe masses are fictitious. GCSE Maths Starter 4. Solve: 3x – 7 = 17. What is 26 x . 13. What is 5/6 of 36. What is the probability of . getting . a . green counter out . of this bag. ?. Find a percentage of a quantity in order . ( General ) Percentage ( OBC ) Percentage ( SC ) Percentage ( ST ) Percentage ( PWD ) 1B.A. Ist year91% and above in agg.90% and above in agg.89% and above in agg.89% and above in agg.89% and above in ( General ) Percentage ( OBC ) Percentage ( SC ) Percentage ( ST ) Percentage ( PWD ) 1B.A. (Prog.) Ist yearADMISSION CLOSEDADMISSION CLOSED2B.A. (Prog.) SECOND ADMISSION LIST Kirori Mal Col 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. . 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. Percentage Yield and Percentage Purity. It is assumed in a chemical reaction that our products are always produced 100% pure. That means whatever our reactants are will all be reacted and turn into pure product without any by-products. PRESENTED BY – RAVI SHANKAR. COMPUTER INSTRUCTOR . J.H.S. SEONDARA, BILARI . Compounds are ALWAYS composed of elements in fixed ratios. This is often referred to as the . Law of Definite Proportions.. This law states that elements are always present in the same proportions by mass in a compound. I.e. H. In a group, calculate the percentage of flasks, owls, . Marios. , pencils & stars. What if this was related to mass? Calculate the % by mass for each of the objects.. 100 g. 20 g. 5. 0 g. 2 g. 6. The Mole. Chemist’s counting number. amount. of a substance . 1 mole is equal to 6.022 x 10. 23. atoms or particles or molecules (Avogadro’s number). There are always 6.022 x 10. 23 . particles in . L.A. Kuehn, J.W. Keele, G.L. Bennett, . T.G. McDaneld, T.P.L. Smith, W.M. Snelling, . T.S. Sonstegard, and R.M. Thallman. United States Department of Agriculture. Agricultural Research Service. What breed is it?. Prof.P.A.Navale. Dept. of Commerce. . . Percentage. Percentage is a mathematical concept that appears very frequently in everyday life. You read that a merchant is offering a twenty percent discount on a selected group of items.. This resource provides animated demonstrations of the mathematical method.. Check animations and delete slides not needed for your class.. 80. 80. 80. Using decimals to find a percentage of a quantity.. Objectives:. -         . The student will determine percentage composition from formula data.. -         . The student will determine percentage composition of a hydrated salt..