Chemistry question and answers for July 12, 2023
- Q Calculate the percent dissociation of 0.40 M benzoic acid,C6H5COOH. (Ka = 6.3 x 10^-5)___%?
- Q The amino acid leucine has two titratable groups, the α-amino,pKa 9.6 and the α-carboxyl, pKa 2.4. Calculate the ratio of acidicand basic forms and express them as [A]/[HA] ratio or...
- Q What is the overall lifetime, in seconds, ofhydroperoxy radicals in the polluted troposphere where[O3] is 100 ppb and [NO] is 20 ppb? Repeat thecalculation for the clean troposphere where [O3]...
- Q An aqueous solution containing 10g of an optically pure compoundwas diluted to 500 mL with water and was found to have a specificrotation of -133 degrees. If this solution were...
- Q Draw all the atoms in a trans peptide linkage from C alpha ofone amino acid to C alpha of the next amino acid (do NOT includeatoms of the side chains)...
- Q Which of the following is false about wavelengths of electromagnetic radiationa) Radiation with short wavelengths have high energies b) Energy does not depend on wavelength c) Radiation with long wavelengths have low...
- Q nicotine is resposible for the addictive properties of tabacooassume Kb1= 1.05x10^-2 and Kb2= 1.32x10^-11. Determine the pH of a0.00125M solution
- Q sketch the general appearance of the curve for the titration ofweak diprotic acid with NaOH. what chemistry governs the pH in eachdistinct region of the curve
- Q N-Bottle LabDetermine the correct identity of thirteen (14)cations and six (6) anions in fourteen (14) different bottles usingflame tests, acid-base properties, solubility rules, formation ofcomplex ions, and types of chemical...
- Q Describe the general function of each of the following types ofsteroid hormones:EstrogensAndrogensProgestinsMineralocorticoids
- Q Use the following pair of reduction half-reactions to design agalvanic cell. Then write in the proper coefficient for each of thespecies involved in the overall reaction. Water molecules andprotons are...
- Q Balance the following skeleton reaction and identify theoxidizing and reducing agents: H2S(g) +NO3-(aq) --> S8(s) +NO(g) [acidic].Include the states for each reactant and product in the balancedchemical equation. Do not...
- Q Which of the following is the strongest acid?  HOI HOH HOCI HOBr HSH
- Q Which of the following statements is (or are) correct? (1) All transition metal carbonates are soluble in water. (2) All salts of chlorate ion are insoluble in water except those of ammonium...
- Q Which of the following occur as the wavelength of a photon increases? the frequency decreases the speed decreases None of the above occur as the wavelength a photon increases Planck's constant decreases the energy increases
- Q Which of the following areclassified as an acetal?
- Q Which of the following is a/are correct name(s) for the molecule below? *choose all correct answers, this question is graded as: # of correct answers - # incorrect selections m-nitrotoluene 1-methyl-3-nitrotoluene 3-nitrotoluene 3-nitro-1-methylbenzene
- Q Which of the following is NOT a polar aprotic solvent?  dimethylsulfoxide (DMSO) acetone DMF ethanol
- Q Which of the following is not soluble in water?
- Q which of the following reactions are spontaneous?
- Q Which of the following is an example of an amorphous solid? 01. Water 02. Salt 03. Gold 04. Soot 05. Diamond
- Q Which of the following compounds are meso compounds?
- Q What is stoichiometry? Why is this concept important tounderstanding how chemical reactions proceed?
- Q Prior to their phaseout in the 1980s, chemicals containing leadwere commonly added to gasoline as anti-knocking agents. A 4.351 gsample of one such additive containing only lead, carbon, andhydrogen was...
- Q Cumene, a hydrocarbon,is 89.94% carbon, and its molar mass is 120.2 g/mol.What are thea)empirical and b) molecularformulas for Cumene? Show your work
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