C2 Topic 5: Quantitative Chemistry This topic looks at: RAM and RFM Empirical formula Calculating masses of reactants and products Percentage mass How can you calculate the percentage mass of an element in a compound? Calculate the percentage mass of oxygen in 1. CO and 2. CO2 What is the RAM of Carbon Magensium Pb 4. Potassium 5. Neon What is the RFM of Water Carbon Dioxide CaCO3 Mg(OH)2 H2SO4 What is the empirical formula? Work out the following empirical formulas below 1.Water, is a sample contains 0.6g of hydrogen and 4.8g of oxygen 2. Lithium carbonate, if a sample contains 2.8g of lithium and 2.4 g of carbon and 9.6g of oxygen. Keywords: Cabron-12, atomic mass, ratios, How can you work out the yield? What are the reasons for not achieving the expected yield?

C2 Topic 5: Quantitative Chemistry This topic looks at: RAM and RFM Empirical formula Calculating masses of reactants and products Calculating Reactants and Products 1. a. What is the theoretical yield that could be obtained from 256g of sulfur dioxide. 2SO2 + O2  2SO3 b. The actual yield of sulfur trioxide produced is 202g. Calculate the percentage yield. 2. a. Iron is extracted from iron oxide by reducing with carbon Fe2O3 + 3CO  2Fe + 3CO2 Calculate the theoretical yield of iron that could be obtained from 320 g of iron oxide. b. The actual yield of iron produced is 89.6g. Calculate the percentage yield. Name 3 products made in the petrochemical industry 1. 2. 3. Why is it expensive to dispose of waste products? Using ideas about waste products explain why people would object to a proposal to build a new factory to manufacture plastics near to their home? Keywords: Cabron-12, atomic mass, ratios,