Account of microwave irradiation for accelerating organic by El Sayed H. El Ashry and Ahmed A. Kassem PDF

By El Sayed H. El Ashry and Ahmed A. Kassem

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Weight of beaker 2 and NaCl ______________ g 8. Weight of NaCl: (7) À (6) ______________ g 9. Weight of beaker 3 ______________ g 10. Weight of beaker 3 and sand ______________ g 11. Weight of sand: (10) À (9) ______________ g Calculations 12. Weight of recovered solids: COPYRIGHT ß 2010 Brooks/Cole, Cengage Learning (5b) + (8) + (11) ______________ g 13. Percentage yield (percentage of solids recovered): % ¼ [(12)/(3)] Â 100 ______________ % 14. Percentage of naphthalene: % ¼ [(5b)/(3)] Â 100 ______________ % 15.

3 oz. ), grams (g), and milligrams (mg)? Show your work and express your answers to the correct number of significant figures. Experiments for General, Organic, and Biochemistry n Bettelheim/Landesberg E XPERIMEN T 2 Density Determination BACKGROUND Samples of matter can be identified by using characteristic physical properties. A substance may have a unique color, odor, melting point, or boiling point. These properties do not depend on the quantity of the substance and are called intensive properties.

Gently tap the sides of the cylinder with your fingers to ensure that no air bubbles are trapped in the metal. 05 mL (7). 1). 1 Measurement of volume of an irregular-shaped object. 30 Sample 5. Carefully recover the metal sample and dry it with a paper towel. Repeat the experiment for a second trial. 6. Calculate the density of the metal sample from your data (9). Determine the average density from your trials, reporting to the proper number of significant figures. 7. 1 (10). 8. Recover your metal sample and return it as directed by your instructor.

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Account of microwave irradiation for accelerating organic reactions by El Sayed H. El Ashry and Ahmed A. Kassem


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