13 please ii) Which method would be used to separate a bomogeneous solid-liepid mixtnea) filtrationb) evaporatione) separatory funnel7. How many kilojoules of energy are required to raise the temperature of 448g of water from 3WC to 50°C7d) distillation8. If it takes 849 J of energy to raise the tempernture of 218g of an unknown metal from 50 C to 68 C, what is themetal's specific heat?9. What volume will be occupied by a piece of silicon weighing 61.7g if the density of silicon is 2.33 g/cm710. It took 4.15 x 103 J of energy to raise the temperature of a piece of copper metal from 31 C to 84 C. What is themass of the piece of metal? The specific heat of copper is .0908 cal/g°C.11. The density of magnesium metal is 1.74 g/cc. What is the mass of 85.1 cc of magnesium?12. At one time, silver sold for $5.03 per ounce. If the density of silver is 10.5 g/cm, calculate the cost of 8.91 cmof silver at that price. (Give this answer in 4 sig figs)13. The Nutrition Facts on a 12-pack of Dr. Pepper specify that a single serving is one can and that a single servingcontains 80 Calories. How many kilojoules of energy are contained in two thirds of the entire 12-pack?100

Given: Energy in a pack of 12-pack of Dr. Pepper = 80 Calories. To find: Energy in 2/3rd of the…

Answered: of silver al Wai piico. 13. The…

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter2: Crystallization

Section: Chapter Questions

Problem 3Q

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Take the solution 10.12g, add 10mL of deionized water, and cool the solution to 0 degrees Celsius. How much CuSO4, 5H2O crystallizes out?
A 18 g of unknown organic sample was dissolve in 756 mL of benzene. The boiling point of benzene was increased by 3.36oC. As the first step of analysis, determine the moecular weight of the unknow sample? Kb of benzene= 2.64oC/m Bb of benzene = 80.09 oC density of benzene = 0.874 g/mL at 25 °C Answer in whole number, no units required.
19 g of unknown organic sample was dissolve in 640 mL of Dicloromethane (DCM). The boiling point of benzene was increased by 3.78oC. Determine the molecular weight of the unknown sample? Kb of DCM = 2.42oC/m Bb of benzene = 39.6 oC density of benzene = 1.33 g/mL at 25 °C Round your answer to the nearest whole number, no units required.
What volume (in microlitres) of a stock solution of 25% KCl would you need to generate 12.5mL of a 0.075% solution of KCl. What volume (in microlitres) of a stock solution of 25% KCl would you need to generate 12.5mL of a 0.075% solution of KCl. (MW of KCl is 74.55)
1) How many milliliters of 70% ethanol and 20% ethanol must be mixed to prepare 500ml of 30% ethanol? 2) A gaseous blend of nitric oxide and nitrogen (NOmax) contains 0.09% v/v nitric oxide (NO) and 99.92% v/v nitrogen. Express the strength of nitric oxide in PPM (round to whole number) 3) The ratio strength of a 10mL vial of neostigmine methylsulfate injection USP is 1:1500.Calculate the amount of neostigmine methylsulfate in milligrams contained in the 10mL vial. (Round to the whole number).
A pipet is used to transfer 6.00 mLmL of a 3.75 MM stock solution in flask “S” to a 25.00-mL volumetric flask “A,” which is then diluted with DI H2OH2O to the calibration mark. The solution is thoroughly mixed. Next, 10.00 mLmL of the solution in volumetric flask “A” is transferred by pipet to a 50.00-mL volumetric flask “B” and then diluted with DI H2OH2O to the calibration mark. Calculate the molarity of the solution in volumetric flask “B.”
MAKE A FLOWCHART/SCHEMATIC DIAGRAM Procedure: Place 20 drops of each of 0.2M CuSO4 in a centrifuge tube. Then add 5 drops of freshly prepared 6M (NH4)2S to each centrifuge tube. Record your observation. Centrifuge the mixtures for 3 mins. and decant the supernatant liquid. Add 10 drops of DI water and 10 drops of 6M HNO3. Stir and boil the mixture in a hot water bath for 5 mins. centrifuge the mixture for 3 mins. Decant the supernatant solution from procedure 3. Discard the To each of the supernatant liquid, add 6 drops of 6M H2SO4. Allow themixtures to cool and 5 drops of DI water. To the mixtures in procedure 4, add few drops of concentrated NH3 until the solution becomes basic. Confirm using a litmus paper. Record your observation. Add 1 drop of 5M NaOH and 1 drop of 0.1 M SnCl2 to the centrifuge tube containing Bi3+ ion , centrifuge and decant the supernatant liquid. To the solution containing Sn 2+ion , add 6M HCl , dropwise in the test tube. Stir well. Add excess HCl in the…
Prepare 1500mL of 0.5N H2SO4 solution with specific gravity of 1.84g/mL and assay of 97%
4.0g of potassium hydrogen tartrate was added to 300mL distilled water. The temperature of the solution is 23.1C. The liquid was filtered and 50mL of the filtered solution was transferred to 250mL beaker, two drops of phenolpthalein was added to the 250mL beaker. The concentration of NaOH is 1.0 M that is filled in the 2mL graduate pipette, single drops of NaOH was added to the 250mL beaker until the solution turns pink and the potassium hydrogen tartrate reach the endpoint. The datd of four trials was collected. Please answer the following questions 4) calculate ksp for potassium hydrogen tartrate for each trial and average ksp for thr experiment 5) calculate the percent error in you value of ksp using reference that is found as the theoretical value. 6) why was the temperature of the saturated solution recorded?
4.0g of potassium hydrogen tartrate was added to 300mL distilled water. The temperature of the solution is 23.1C. The liquid was filtered and 50mL of the filtered solution was transferred to 250mL beaker, two drops of phenolpthalein was added to the 250mL beaker. The concentration of NaOH is 1.0 M that is filled in the 2mL graduate pipette, single drops of NaOH was added to the 250mL beaker until the solution turns pink and the potassium hydrogen tartrate reach the endpoint. The datd of four trials was collected. Please answer the following questions 1) calculate the total volume and moles of NaOH required to reach the endpoint for each trial. 2) calculate the molar solubility of potassium hydrogen tartate ( in mol/L) for each trial. 3) calculate the average molar solubility of potassium hydrogen tartate for the four trials. What is the average solubility of potassium hydrogen tartrate in g/L? 4) calculate ksp for potassium hydrogen tartrate for each trial and average ksp for thr…
10g coffee 4g sodium carbonate 40m dichloromethane 160ml distilled water coffee filter What are the principles behind caffeine being extracted from coffee using the above items? 1st sodium carbonate mixed with coffee then brought to a boil for 20min then solution/grinds are filtered. Then solution is added to a separatory funnel with 15ml of dichloromethane and two layers are observed so the bottom layer with DCM contains the caffeine, then this layer is collected in a beaker and dried out using molecular seeds. Then the solvent is brought to a boil with crude caffeine remaining and recystallized using 95% ethanol and brought to a boil again. Then the contents are vaccum filtered and allowed to dry resulting in 30mg caffeine.
Take the solution 10.12g, add 10 mL of deionized water, and cool the solution to 0 degree Celsius. How much KNO3 remains in solution?

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of silver al Wai piico. 13. The Nutrition Facts on a 12-pack of Dr. Pepper specify that a single serving is one can and that a single serving contains 80 Calories. How many kilojoules of energy are contained in two thirds of the entire 12-pack?