Chemistry question and answers for August 11, 2023
- Q In Chernobyl (miniseries) why did people use lead coffins andconcrete to bury fallen firefighters? Try to write 500+ words.
- Q For the following reaction, Kc = 255 at 1000 K.CO (g) + Cl2 (g) ⇌ COCl2 (g)A reaction mixture initially contains a COconcentration of 0.1550M and a Cl2concentration of 0.178...
- Q 5- Ascorbic acid (molecular weight = 176.12) is too acidic toadminister by the parenteral route. The acidity of ascorbic acid ispartially neutralized by adding a basic compound, usually sodiumcarbonate or...
- Q An aspirin tablet (acetylsalicylic acid, pKa = 3.49,molecular weight = 180.15) was taken orally with cold water to makea solution of aspirin in the stomach fluids of 0.00167 M. The...
- Q cansomeone please give a balanced equation forhexane + lucas test: C6H14 + ZnCl2/HCl >cyclohexanol + chromatic acid test: C6H12 + H2CrO4 >Hexane + chromatic acid test: C6H14 + H2CrO4 >
- Q ********PLEASE ANSWER*************there are 31.4g sample of an unknown hydrocarbon samplecontaining only C, H, and O. if those 31.4g are burned completelyin O2 and gives 92.4g of CO2 and 27.0g of...
- Q The pale pink color of the titration solution at the end pointwill fade to colorless after several minutes when exposed to theatmosphere. Account for this color change.
- Q Data Table 2. Reviewing Compounds.#1Compound NameCompound NameAre #1 geometric isomers, structural isomers, or notisomers?#2Compound NameCompound NameAre #2 geometric isomers, structural isomers, or notisomers?#3Compound NameCompound NameAre #3 geometric isomers, structural isomers,...
- Q Abeaker containing 50.0 ml of 0.300M Ca2+ at ph 9 is titrated with0.150M EDTA. Calculate the pCa2+ at the equivalence point
- Q 25mL of acetic acid was placed in a 250mL flask and dilutedusing water to the mark (250mL) and mixed. 25mL of this solution isthen placed into a seperate flask and...
- Q A 54.3 mg sample of sodium perchlorate contains radioactivechlorine-36 (whose atomic mass is 36.0 amu).If 29.6% of the chlorine atoms in the sample are chlorine-36 andthe remainder is naturally occurring...
- Q Chlorine gas can be prepared in the laboratory by the reactionof hydrochloric acid with manganese(IV) oxide.4 HCl ( aq ) + MnO 2 ( s ) ⟶ MnCl 2 (...
- Q Procedure 1. A 25 mL round bottom flask equipped with a stir baris loaded with 13 mg of CdO powder, 0.6 mL of oleic acid, and 10 mLof 1-octadecene. The...
- Q Procedure followed:CaC2 to Gas X to BenzeneBy IR spectroscopy on a liquefied sample of the reactionproduct, it was found that not all the amount of X gas wasconverted to benzene.Toconfirm...
- Q List at least one chemical reaction if possible ofMelatonin.
- Q Explain the main difference between the adsorption (initial)stage and ordering process (second stage) of Self=Assemblemonolayer using the relevant chemical concepts, models andforces.
- Q 12. An electrolytic dissociation of water. The ionicproduct of water. Hydrogen index. dissociation degree(α) of the electrolyte as a quantitative description of theequilibrium ionization process. The divisionof electrolytes on the...
- Q CAN YOU PLEASE EXPLAIN HOW TO DETERMINE METHOD I SHOULD USE TOFIND THE PH IN SUCH PROBLEMS. WHAT RULES SHOULD I FOLLOW OR THINKOF TO DETERMINE SUCH QUESTIONS. (STRONG ACID,...
- Q a) The solubility product for PbCl2 is 1.6 ∙ 10-5. Thesolubility product for AgCl is 1.6 ∙ 10-10. How does the solubilityof lead chloride in a 0.10 M AgNO3 solution...
- Q Be sure to answer all parts.How many photons at 586 nm must be absorbed to melt 4.65×102 g of ice? (It takes 334 J to melt 1 g of ice...
- Q Explain intermolecular forces. What are they? How do they work? Howdo I find them if it's possible to find them?
- Q discuss at least 2 best practices in pharmaceuticaldistribution. Illustrate why by providing examples, these areconsidered best practices. Discuss the ramifications of violationof the best practices you chose. Tie the best...
- Q Be sure to answer all parts.Calculate the wavelength (in nm) of light with energy 1.89×10−20 J per photon...............nmFor light of wavelength 460 nm, calculate the number of photons perjoule..........× 10^.........
- Q List three changes you would expect in the IR spectrum of2,3-dibromocinnamic acid as compared to the IR spectrum oftrans-cinnamic acid. Make sure to reference the approximatewavenumber of any relevant peaks...
- Q A chemistry graduate student is given 250.mL of a 0.10M chlorousacid HClO2 solution. Chlorous acid is a weak acid withKa=1.1x10^−2.What mass of NaClO2 should the student dissolve in the HClO2solution...
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