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Q: What is the pH of a solution containing 7.41 x 10-2 hydroxyl ions?
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Q: Draw the skeletal structure of butan-1-amine from the condensed formula (shown below).…
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Q: What is the pH of a solution containing 7.41 x 10-2 hydroxyl ions?
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- Consider the compounds 1-pentanol,CH3-CH2-CH2-CH2-CH2-OH, melting point -78C boiling point 138C, MW=88.15. 1,6-hexanediol ,HO-CH2-CH2-CH2-CH2-CH2-CH2-OH, mp 42C,bp=250C.MW=118.18. The compound 1,6-hexanediol is more soluble in water than 1-pentanol is. This is because 1,6-hexanediol.... 1) has more carbon atoms 2)has a higher molecular weight 3)has more -OH groups 4)is a solid at room temperatureMelting point 120-123 base in data , do you think you make pure E stilbene successfully? Explain20- In the lab, you prepared phenylmagnesium bromide reagent using 0.81 g magnesium turnings (MW- 24.31 g/mol) and 3.6 mL bromobenzene (MW- 157.01 g/mol, density- 1.50 g/mL) in 15 mL diethyl ether (MW-74.12 g/mol, density - 0.713 g/mol). You then added 2.04 g benzophenone (182.217 g/mol) which was previously dissolved in 6.0 mL of diethyl ether solution to the phenylmagnesium bromide solution.What is the theoretical yield for triphenylcarbinol (MW- 260.33 g/mol) in grams? with the appropriate number of significant figures.
- Fully explain what the data in IR and GC-MS spectra mean in the dehydration of 2-Methylcyclohexanol . GC-MS data (gas chromatography): Illustrated in picture *ignore peak at 8.87 minutes Peak 1 mass = 96.2 (1-methylcyclohexene) Peak 2 mass = 96.2 (3-methylcyclohexene) Peak 3 mass = 114.2 (impurity) IR Spectra (Infrared Spectroscopy): Illustrated in picture.An organic lab student carried out the reaction of methylmagnesium iodide with acetone(CH3COCH3), followed by hydrolysis. During the distillation to isolate the product, she forgot to mark the vials she usedto collect the fractions. She turned in a product of formula C4H10O that boiled at 35 °C. The IR spectrum showed onlya weak O¬H stretch around 3300 cm-1, and the mass spectrum showed a base peak at m>z 59. The NMR spectrumshowed a quartet (J = 7 Hz) of area 2 at d 3.5 and a triplet (J = 7 Hz) of area 3 at d 1.3. Propose a structure for thisproduct, explain how it corresponds to the observed spectra, and suggest how the student isolated this compound.The molar absorptivity of 2,5-dimethyl-2,4-hexadiene in methanol is 13,100 M-1cm-1. What concentration of this diene in methanol is required to give an absorbance of 1.6? Assume a light path of 1.00 cm. Calculate concentration in these units. Q.) Moles per liter
- • What if there is no stability in the emulsion? • How does an emulsion work? • How do you prepare an emulsion? • Provide and explain examples of defoamers that you recognize.What is the strongest IMF in pure 2-octanone? I know it is a ketone and has some polarity due to this, but the carbon chain so long, I wonder if london dispersion forces are stronger?The leaves of the Brazilian Tree Senna multijunga contain a number of pryidine alkaloids that inhibit acetylcholinterinase. Two recentyl isolated isomeric compounds have the strcture have the strcture shown below. (NOTE: M=293) Use the mass spectral data provided to determine the precise location of the hydroxyl group in each isomer. Isomer A: EI-MS, m/z(rel. int): 222(20), 150(10), 136(25), 123(100) Isomer B:EI-MS, m/z(re;. int): 236(20), 150(10), 136(25), 123(100)
- Propose a structure consistent with each set of data. a.C9H10O2: IR absorption at 1718 cm−1b.C9H12: IR absorption at 2850–3150 cm−1SHOW COMPLETE SOLUTIONS Q3. Which isolate has A260/280 ratio of above 2.0?) Calculate the ΔG°rxn using the following information. 4 HNO3(g) + 5 N2H4(l) → 7 N2(g) + 12 H2O(l) ΔG°rxn = ? ΔG°f (kJ/mol) -73.5 149.3 -237.1