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Decaffeinated coffee is produced by extracting the caffeine from coffee with a solvent. Initially dichloromethane
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General, Organic, and Biological Chemistry - 4th edition
- A 1 mL sample of glycogen was calculated to contain 35 µmol (micromole) glucose. To 1 mL of this sample was added 2 mL of 2 M HCL. It was then hydrolysed by boiling the solution for 15 minutes. After boiling the hydrolysate was cooled and made up with H2O to a final volume of exactly 10 mL. The glucose was measured in this solution and found to have a concentration of 570 µg/mL (microgram/milliliter). i) Calculate the mass (mg) of glucose in the 10 mL of hydrolysate. As the 1mL of glycogen sample was made up to a final volume of 10 mL, this mass of glucose was produced by the hydrolysis of the original 1 mL glycogen sample. ii) Calculate the amount (µmol) of glucose produced by the hydrolysis of the glycogen sample. iii) Calculate the purity of the glycogen used in the sample as % Purity = (moles of measured glucose/ moles of calculated glucose in glycogen) *100 iv) state your answer in a complete sentence.arrow_forwardA soft drink contains 11.5%% sucrose (C12H22O11C12H22O11) by mass. How much sucrose, in grams, is contained in 355 mLmL (12 ozoz) of the soft drink? (Assume a density of 1.04 g/mLg/mL.)arrow_forwardAscorbic acid has a chemical formula of C6H8O6 and is water soluble. A solution containing 80.5 g of ascorbic acid is dissolved in 210g of water. The resulting solution has a density of 1.22g/mL at 55°C. Calculate the mass percentage of the ascorbic acid in the solution.arrow_forward
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- Explain the role of steam in facilitating the distillation of essential oils.arrow_forwardDoes washing your hands with soap help prevent the spread of coronavirus? The structure of soap molecules is like the lipids in the membrane layer of the virus. The soap molecules can surround the virus and remove it from the skin. It is also thought that soap molecules can disrupt the lipids in the membrane and can therefore 'disintegrate' the virus. Sodium laurate is a common soap molecule. It has the formula CHa(CH 2) 10 CO2- Na.. Sodium laurate can be produced from coconut oil and sodium hydroxide. Questions: 1. What are the reactants needed for this reaction? 2. Write down the chemical reaction in the production of sodium laurate. 3. What do you call the process in soap preparation?arrow_forwardA state of dynamic equilibrium exists between the solid sucrose (table sugar) molecules, C12H22O11, and sucrose molecules dissolved in aqueous solution for a saturated sucrose solution. a. Write the equation to represent the dynamic equilibrium. b. What change occurs in the concentration of dissolved sucrose if more solid sucrose is added to the saturated system? Explain. c. If water is added to the saturated solution and the equilibrium is reestablished, what change occurs to the amount (moles) of dissolved sucrose? Explain. d. If water is added to the saturated solution and the equilibrium is reestablished, what change occurs in the concentration (molarity) of dissolved sucrose? Explain.arrow_forward
- a) Explain what catalytic cracking and catalytic reforming are and how they work in oil refineries. b) Explain how fractional distillation works in terms of thermodynamics.arrow_forwardDetermine if concentrated ethanol and water are incompatible. If they are incompatible, state the hazardous conditions which would result from mixing the wastes.arrow_forwardTestosterone is a steroid. Predict the solubility of this structure in water.arrow_forward
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