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What is the weight percent of toluene in a mixture of toluene and n-heaxne that has a spevific gravity of 0.832
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- 19. A liquefied mixture of n-butane, n-pentane, and n-hexane has the following composition: n-C,H10 50%, n-C,H12 30%, and n-C,H14 20%. For this mixture, calculate: a) The weight fraction of each component. b) The mole fraction of each component. c) The mole percent of each component. d) The average molecular weight of the mixture.The boiling points for the compounds are 118 °C and 35 °C respectively. The solubility for both compounds is the same (8g/100g water). Explain this observation for (i) boiling point disparity; (ii) solubility similarity H-bonds form in diethyl ether; n-butyl alcohol forms H-bonds in water H-bonds form in n-butyl alcohol; diethyl ether forms H-bonds in water H-bonds in n-butyl alcohol; Both compounds form H-bonds in water O Both compounds form H-bonds; Both compounds form H-bonds in waterSuppose you have an organic sample X that is somewhat soluble in water, even though it issomewhat more soluble in dichloromethane or ether solvents. But if you do a singleextraction, you get only 60% of your material to transfer from the water to the organic layer.How many “washes” would it take to extract over 90% of your organic material extracted fromthe water layer?
- 4g 5 g 2 g 100 g 49." R Lactic acid Salicylic acid Trichloroacetic acid Flexible collodion qs ad Sig: wart remover. Use as directed. (a) Flexible collodion contains 20% w/w camphor and 30% w/w castor oil. How many grams of each would be contained in 30 g of the mixture? (b) The specific gravity of castor oil is 0.955. How many milliliters of the oil is contained in 30 g of the mixture? (c) If the specific gravity of the mixture is 0.781, what are the percent w/v con- centrations of lactic acid, salicylic acid, and trichloroacetic acid in the mixture?The question is: A student preforms a crystallization on an impure sample of biphenyl. The sample weighs 0.5g and contains about 5% impurity. Based on his knowledge of solubility, the student decides to use benzene as the solvent. After crystallization, the crystals are dried and the final weight is found to be 0.02g. Assume that all steps in the crystallization are performed correctly, there are no spills, and the student lost very little solid on any glassware or in any of the transfers. Why is the recovery so low? I know it’s becsuse the benzene wasn’t a good choice for the solvent but I can’t explain why. Thank you!A bottle of Na2EDTA.2H2O is labeled with an assay of 100.5%, what is this implied? What is the result of heating to 100 ºC?
- STARTING WITH 18ML OF 2-methyl-2-butanol4. The system o-dinitrobenzene-p-dinitrobenzene exhibits a simple eutectic point at 102°C, corresponding to a concentration of 24% p-dinitrobenzene. Determine through an analytical method the maximum amount of pure p-dinitrobenzene that can be obtained from a mixture that contains 80 g of the para-isomer and 20 g of the ortho-isomer? [73.6 g]The chemical method of analysis in determination of the blood alcohol content (%BAC) is: K2Cr2O7 + H2SO4 + C2H5OH → Cr2(SO4)3 + K2SO4 + CH3COOH + H2O What are the stoichiometric coefficients for the reaction above? (please enter the coefficients without spaces and with a coma between the numbers, e.g. 1,2,3,4) During a Breathalyzer Test it was determined that 2.00mg of K2Cr2O7 was consumed by the above reaction. Calculate the number of milligrams of ethanol in the test sample. Calculate the Blood Alcohol Content in this sample (%BAC).
- which of the following froactions is equivalent to 55% 13/25, 11/20/, 9/20, 12/25Determine the gravimetric analysis of the products of complete combustion of acetylene ?2 ?2 with 200 percent stoichiometric air.A bloodhound, with an acute sense of smell, sits at one end of a long, unventilated corridor. At the other end of the corridor a small amount of an aerosol is released containing the volatile, fragrant compounds= • fructone (C8H1404) • benzyl mercaptan (CHeS) 2-acetyl-1-pyrroline (CH9NO) • acetaldehyde (C,H40) • 6-acetyl-2,3,4,5-tetrahydropyridine (C>H11NO) Rank the compounds in the chronological order they are detected by the hound. v 2-acetyl-1-pyrroline v benzyl mercaptan v6-acetyl-2,3,4,5-tetrahydropyridine v acetaldehyde fructone