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What is the check digit for the Flamin’ Hot Cheetos with the following UPC: 0 28400 58989
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- I have a solution of a standard reference molecule and its' enantiomer. I used 25 mg of the mixture and dissolved it in 30 mL of solvent. The pathlength of my tube is 65cm. The specific rotation of the reference material is 100. For my sample, i got+0.25 degrees. How much of my reference molecule is in the solution in % and mg?Protein X has an absorptivity of 0.4 mL·mg-1 ·cm-1 at 280 nm. What is the absorbance at 280 nm of a 2.0 mg ·mL-1 solution of protein X? (Assume the light path is 1cm).What's the answer for 15.18 a-c
- Viktor measures out 2.100 g of the ibuprofen from the bottle and dissolves it in 15.0 mL of ethanol. He transfers this solution to a 1.0 dm long tube and the polarimeter gives him a reading of +7.3416 deg for this sample. The literature specific rotation for ibuprofen is 57 deg. What is the observed specific rotation for this sample? What is the enantiomeric excess (EE) for this sample?Which compound has a larger Rf-value? ExplainPhenol has a pka of 9.92 and a ρ value of 2.25. From this information, determine the Ka of 3,4- dinitrophenol.