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- Is the sodium salt of propanoic acid as effective a soap assodium stearate? Explain.(Concentration) You are tasked to prepare 62.5 ppm of a caffeine standard for an analysis. You need to prepare 50.00 (±0.04) mL of this solution. However, you only have 50.00mL volumetric flasks available and a previously prepared caffeine solution using 0.0250 (+0.0003) g dissolved in 50.00 (±0.04) mL of water. You can use a 25.0000 (+0.0003) mL volumetric pipette to dilute your original solution in half every time. How many dilutions are you supposed to make to reach your target concentration? Write your answer using the appropriate number of digits. Note that the formula mass of caffeine is 194.194 g/mol with negligible error. Number of times to make a dilution: timesThe data below give the concentration of thiol (mM) in the blood lysate of theblood of volunteers: 1.84, 1.92, 1.94, 1.92, 1.85, 1.91, 2.07 Verify that 2.07 is not an outlier for the group. show complete solution
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- Chemistry H,N. CH, H,N. HO, но Phenylalanine (1) Tyrosine (2) H,C HN CH, H,C `CH, H,C но Triethylamine (4) N-acetyl-OMe-Tyrosine (3) All four compounds are dissolved in ethyl acetate. If you started by extracting the solution with 1 M HCI, which of the following compounds would end up in the aqueous layer? 4 12 Instead, you decide to start by extracting the ethyl acetate solution with 5% NaHCO3 (sodium bicarbonate). What will remain in the organic layer? 1 2 45. Give the definition of the inductive effect. What is the reason for its appearance in the molecule? Show the effect of the inductive effect in molecules: bromoethane CH3CH3B1; ethanol CH3CH2OH; fluoroethane CH3CH2F.Will the melting point increase or decrease with the benzoic acid, 4-chloroanaline, and naphthalene if : -You do not remove all of the HCl from the first extraction (mixture) -You forget to do the NaOH extraction (aq layer) -You do not rotovap all of the solvent in the final step (organic layer)