Chemistry question and answers for July 29, 2023
- Q The following work-up steps are part of our second synthesis(“Hydrogenation of a Chalconeâ€).a) Add 15 mL of brine and 10 mL of ethyl acetate to the mixture.Shake vigorously, then separate...
- Q 3. The nitridation of a silicon particle can be described by asimple binary diffusion of oxygen through the nitride film and afast reaction at the silicon/nitride interface, i.e., adiffusion-controlled process;...
- Q 1. 26 mol of P4O10 contains how many molesof P?? mol P2. How many moles of N are in 0.247 g of H2O?? mol N3. How many total atoms are...
- Q Use the link Standard Reduction Potentials to answer thefollowing questions.For each pair of redox couples, write a balanced redox equation,determine the cell potential and the number of electronstransferred. Use the...
- Q In general, how do you draw lewis structures? What are the stepsand then how do you draw the structure based on what you are given?Sorry if this is confusing, I...
- Q 18) The major sink(s) forCl- in the ocean is(are):Formation of authigenic mineralsConsumption by hydrothermal activitiesConsumption by reverse weatheringReaction in sediment pore watersAll of abovea, b and ca and db and...
- Q What is the mass (in grams) of 9.06 * 1024 moleculesof methanol (CH3OH)?
- Q In the lab you were told that the hydrolysis oftert-butylchloride reacts via an SN1 mechanism and yourgraphs were constructed assuming a first-order reaction. Describehow one can graphically determine whether a...
- Q 1. Acetone2. Water3.Isopropyl alcoholA. Rank the three liquids, from slowest rate to the highest rateof evaporation based on the expiremental temperature vs timecurve?B. How does the ranking in A compare...
- Q Coke can be converted into CO�a fuel gas�in the reaction CO2 (g)+ C (s) ? 2 CO (g) a coke that contains 84% carbon by mass and thebalance noncombustible ash...
- Q Problem 10.19The typical atmospheric pressure on top of Mt. Everest (29,028ft) is about 265 torr. Convert this pressure toPart Aatm760  atm  SubmitMy AnswersGiveUpIncorrect; Try AgainPart BmmHg1  mmHg  SubmitMy AnswersGiveUpIncorrect; Try AgainPart Cpascals3.53×104  Pa  SubmitMy AnswersGiveUpCorrectSignificant Figures...
- Q 10.33 predict the shape or geometry of the following mol-ecules, using theVSEPR modelA). SiF4B). SF2C) CoF2D) PCl3
- Q A student uses a volumetric pipet calibrated todeliver exactly 50.0mL of a liquid and then measures the mass ofthe liquid. how is the density determination of the liquid affectedin the...
- Q What is the evaporated volume of one pint of liquid methanol(MW=46.1, SG=0.79) at standard temperature and pressure?
- Q a. In general is there any difference between R and S, and + and-? between d- and l-, and + and -?b. Discuss the validity of the following statements:Â Â Â Â Â Â Â 1....
- Q Can someone that lives in a home with smokers develop breathingproblems from second hand smoke. I am writing a paper on thistopic, i could use any feedback
- Q A. What mass of carbon dioxide is produced from the completecombustion of 3.30×10−3 g of methane?B. What mass of water is produced from the complete combustionof 3.30×10−3 g of methane?C....
- Q * I unerstand this is a chemical engineering questionbut that was not a subject choice *Using the information in Perry's Chemical Engineer's Handbook,compute the Henry's law constant in atm for...
- Q How many grams of dipotassium succinate trihydrate(K2C4H4O4·3H2O, MW = 248.32 g/mol) must be added to 800.0 mL of a0.0524 M succinic acid solution to produce a pH of 5.969? Succinicacid...
- Q What amount of HCl gas must be added to 1.00L of a buffersolution that contains [aceticacid]=2.0M and [acetate]=1.0M inorder to produce a solution with pH= 4.19?
- Q True or False:A. When atoms bond covalently energy is releasedB. All the carbon to carbon bonds in benzene are the same.C. A mole of NH3 and a mole of H2O...
- Q 2. A piece of Al(s) at 98°C is placed in 66g of H2O at 25°C. TheAluminum cools and after equilibrium the final temperature ofAluminum and water is 30°C. What was...
- Q For the eight reactions done in test tubes, explain yourobservations in terms of mechanism (SN1 or SN2) , expectedintermediates (carbocation or a single step conversion) andproduct. When they react with...
- Q 1) Calculate the enthalpy of reaction(ΔHrxn) for the followingreaction:Fe2O3(s) + 3 CO(g) → 2 Fe(s) + 3 CO2(g)Given: 4 Fe(s) + 3 O2(g) → 2 Fe2O3(s) ΔH = –1648 kJ...
- Q Amphetamine (C9H13N) is a weak base with a pKb of4.2.Calculate the pH of a solution containing anamphetamine concentration of 230 mg/L .
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