Chemistry question and answers for September 09, 2023
- Q an ic engine burns octane C8H18 and uses 125% theortical air.theair and fuel enter at 25, the product leave at 700k. in the engine85% of carbon burns to co2 and...
- Q Q: Please explain your interest in participating in theLifeSci NYC internship program. How does this program fit in yourfuture career goals? What professional and personal skills do youhope to learn...
- Q 84) You are in charge of quality control at anautomotive manufacturing facility that is using UNS 7068 aluminumalloy for the engine blocks.  How can you verify thatthis is in fact...
- Q Chapter is over Equilibrium Chemistry and connecting toGravimetric systematic solving.6. Write a charge balance equation and mass balance equationsfor the following solutions. Some solutions may have more than onemass balancePlease...
- Q whycan we disregard the concentration of sodium hydroxide in thisexperiment even though we are measuring thr rate of the reactionbetween NaOH and crystal violet?
- Q Describe the process of each step in the experiment (Fischeresterification/ Isopentyl acetate lab).a. The reaction is done using a reflux condenser.b. The reaction mixture is washed with water.c. The reaction...
- Q The decomposition of XYXY is second order in XYXY and has a rateconstant of 7.16×10−3 M−1⋅s−1M−1⋅s−1 at a certaintemperature.a) What is the half-life for this reaction at an initialconcentration of...
- Q Carbenes are neutral species, which contain a carbon with sixvalence electrons.(i) Draw the hybrid structure of a singlet carbene. In yourdrawing, identify theHOMO and LUMO molecular orbitals.(ii) Draw the reaction...
- Q At a temperature of 25ºC the following cell shows a potential of0.7585 V: Cd/CdCl2 (0.01 M) II AgCl (sat)/Ag(i) calculate the standard electromotive force of the cell; (ii)Calculate the mean...
- Q Reaction 1: NaOH(s)--> NaOH (aq)Reaction 2: NaOH(s) + HCl (aq)--> NaCl(aq)+H2O(l)Reaction 3: NaOH(aq) +HCl (aq) --> NaCl (aq) + H2O (L)1) Describe each reaction as endothermic or exothermic andexplain your...
- Q In this part of today's experiment you will produce cyanotypesusing watercolor paper. Directions 1. Each student should obtain apiece of 4†x 5†watercolor paper. Work with ONE partner. 2....
- Q Explain why it is necessary to select only one wavelength topass through the sample (i.e. why don’t we just shine white lightinto the sample and measure the amount of light...
- Q Given the mole of air as 9.2x10-5 mol, the volume ofwater vapor, after correction, is 5.0 mL while the temperature is75 oC, what is the vapor pressure of water in...
- Q At a temperature of 25ºC the following cell shows a potential of0.7585 V: Cd/CdCl2 (0.01 M) II AgCl (sat)/Ag (i) calculate thestandard electromotive force of the cell; (ii) Calculate the...
- Q Which plastic types gives identical infrared spectra? Why doesthis make sense from their structures?Background info: This is referring to the 6 plastic types: PETE,HDPE, LDPD. PVP, PP ad PS.
- Q Calculate the theoretical yield of aspirin a) in moles and b) ingrams. Assume use of 1.0 g salicylic acid and 2.5 mL aceticanhydride. Show all calculations.
- Q Just as pHpH is the negative logarithm of [H3O+][H3O+], pKapKais the negative logarithm of KaKapKa=−logKapKa=−logâ¡KaThe Henderson-Hasselbalch equation is used to calculate the pHpHof buffer solutions:pH=pKa+log[base][acid]pH=pKa+logâ¡[base][acid]Notice that the pHpH of a...
- Q Please calculate the pH of each of the following solutions: 0.68M NaCH3CO2 (aq); 0.45 M KCN (aq).
- Q Howwould the molar solubility of barium sulfate be impacted if it wereto be dissolved in 0.010 M CaSO4 (with no other change inconditions)?A. It would increaseB. It would stay the...
- Q A 1.0 L buffer solution is made up of 0.15M NaF and 0.20 M HF (pK a = 3.17) . 0.05 mol of HCl is added to it. What is...
- Q PART A: Choose the bond below that is leastpolarA. C-FB. C-ClC. C-BrD. C-IE. C-OPlease explain how the answer is foundPART B: Which of the following molecules ispolar?A. CO2B. CCl4C. H2D....
- Q Explain the use of solvents like ethanol, ether, methylene chloridein organic synthesis?
- Q 25 ml of 0.105 M HCl is titrated with 0.210 M NaOHa. What is the ph after 5 ml of the base is added?b. what is the ph at the...
- Q howis it theoretically possible to determine the diastereomeric ratioof isomers using gas chromatography ?
- Q The weak acid HA with a dissociation constant Ka is distributedbetween and organic solvent and water. If the only extractablespecies is the undissociated species HA with a partitioncoefficient K, derive...
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