This title has not been through the Cambridge endorsement process. Suggestions for practical activities are included, designed to help develop the required experimental skills. Exam-style questions at the end of each chapter and a host of revision and practice material on the CD-ROM are designed to help students maximise their chances in their examinations.
A step-by-step approach will help every learner reach their potential in science. This second edition is up-to-date for the latest Cambridge syllabus. The workbook covers both the Core and the Supplement material. Some non-metals and their compounds Chapter Organic chemistry Chapter Polymers Chapter About Author. Paul Ingram. The reason is that electronic gadgets divert your attention and also cause strains while reading eBooks. However, we provided the links which are already available on the internet.
The content is meant for individual and noncommercial uses only. This Pdf book provided for students who are financially troubled but deserving to learn. Thank you! Suppose you own a factory that makes paint or fertilisers. You will want the highest yield possible, for the lowest cost! Now imagine your factory makes medical drugs, or flavouring for foods.
The yield will still be important — but the purity of the product may be even more important. Impurities could harm people. It will have impurities mixed with it — for example small amounts of unreacted substances, or another product. Its full name is acetylsalicylic acid. Purity check! Some aspirin was prepared in the lab. How pure was the aspirin sample? The aspirin could be purified by crystallisation. Repeated crystallisation might be needed. What was the purity of the sample?
You can work out its purity from the volume of carbon dioxide given off. The equation for the reaction is:. Chalk forms in the ocean floor, 1 mole of gas has a volume of 24 cm3 at rtp. The sea salt obtained is found 2 g of aspirin was obtained from g of salicylic acid. What was the cm3 of carbon dioxide gas at rtp.
What was the percentage yield? Mr of CO2 5 The mass of the in g of manganese? Their molar masses are 42 and 84 g respectively. What is its 13 Mercury II oxide breaks down on heating: concentration in moles per dm3? What volume of solution will you oxide. Open navigation menu. Close suggestions Search Search. User Settings. Skip carousel.
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Related titles. Carousel Previous Carousel Next. Jump to Page. Search inside document. Using moles 6. As you saw on page 70, the masses of atoms are found by comparing carbon magnesium them with the carbon atom: This is an atom of carbon More examples of moles Sodium is made of Iodine is made of Water is made of single sodium atoms. A B C Solution A contains 2.
So we can write: 12 g of carbon combines with 32 g of oxygen In the same way: 6 g of carbon combines with 16 g of oxygen 24 kg of carbon combines with 64 kg of oxygen, and so on. These are the steps: Find the masses that Change grams This tells you the So you combine in grams by to moles of ratio in which can write experiment. Draw up a table again: Elements that combine magnesium oxygen Masses that combine 2. Once you know those, you can work out the molecular formula by following these steps: To find the molecular formula: Mr i Calculate for the compound.
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