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If this NMR is of a low molecular weight ether, propose a possible structure.
!["unknown C run #1" 1 1 C: \Bruker\Topspin4.0.9
unknown C run #1
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[ppm]
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3.9217
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- DATA Note: Use the videos as references except when data is provided here. Table 1. Selection of Recrystallizing Solvent. Solvents Dissolution at room temperature? (+ or −) Dissolution at elevated temperature? (+ or −) Distilled water - - Acetone + n/a 95% ethanol - + Toluene + n/a Solid sample: Naphthalene Table 2. Mass Measurements. Mass, g Sample solid 0.5021 Empty watch glass 35.7602 Watch glass with recrystallized sample 36.2485 Table 3. Melting Point Determination. Temperature, oC Appearance of Sample in Capillary Tube … Solid 78.4 Solid 79.3 Solid with signs of liquid 79.9 Solid, liquid 80.6 Liquid, solid 81.3 Liquid with signs of solid … Liquid Theoretical Melting Point, oC: 80.2°C (176.4°F) QUESTIONS Which solvent should be used as the recrystallizing solvent? Check if your chosen solvent satisfies all characteristics of a good…https://m.youtube.com/watch?v=vM1SP346XBc&list=PLeJOSNLNZfHubfLdq0kOayASeUllMOGn4&index=4 I watched this the lecture video over and over and I am allowed to work with someone but I am having trouble with part B and I provided the YouTube link of the data or video attached to this lab1) 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).
- does melting point determination remove impurites in crude protein?A hi Experts...please help me, i need it until 6:30 pm. Hope you can answer it BEFORE the time thank you soo much! KINDLY MAKE THE ANSWER SHORT FOR 2-3 SENTENCES IF POSSIBLE. ---Explain the effect of heat and time on foaming characteristics of proteinSolid Na2S is slowly added to a solution of 1.0 x 10-3 M Cr3+ (with no change in volume). At what [S2-] will Cr2S3 start to ppt? For Cr2S3, Ksp = 1.0 x 10-20
- 4 In the prior problem set we used the regular solution model to show that oil and water do not mix unless the solution is very dilute. But regular solution theory is not the best model to use for such a calculation because oil and water do not have similar molecular volume. Here we use Flory-Huggins Polymer theory to explore if oil and water mix. Assume oil is a hydrocarbon polymer for which N=10 and water is the solvent. For hydrocarbon-water mixtures assume wSP=5 and T=300K. Assume the volume fraction of oil is φoil=0.3. a. Calculate ΔS¯MIX . b. Calculate \(\Delta \bar{H}_{MIX)\) assuming the same conditions as part A. c. Calculate ΔG¯MIX assuming the same conditions as part A.Can you help me determine the required amount of 500mg ascorbic acid tablets to puverize the necessary amount of distilled water to make the desired concentration of stock solution (0.1M) Show complete and justifiable computations pls.1) 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).
