Chemistry question and answers for September 22, 2023
- Q A 27.5 L sample of oxygen gas is at 25°C and 1.05 atm. If thegas is cooled to –40.°C while the pressure is increased to 2.00 atm, calculate thenew volume...
- Q During mid-January 2004, average gas concentrations measured inCache Valley were:ammonium (NH4) = 16 µg/m^3nitrate (NO3) = 45 µg/m^3NH4 + NO3 = NH4NO3 (s)a) Is NH4 or NO3 the limiting factor...
- Q Suppose that you have 175mL of a buffer that is .150M in bothformic acid and its conjugate base.a) what is the buffer range of the buffer solution?b) what is the...
- Q An electrolysis cell is operated for 3000 s using a current of1.50 A. From which 1.0 M solution will the greatest mass of metalbe deposited? Answer is A please explain(A)...
- Q 1)To determine the oxidation state of a monoatomic ion, firstdetermine the charge of the ion. The oxidation state will be thesame as the charge. For example, I forms the monoatomic...
- Q Which of the following reactions in the stratosphere cause anincrease in temperature there?Check all that apply.Check all that apply.O2(g)+hν⟶2O(g)O(g)+O2(g)⟶O3∗(g)O(g)+N2(g)⟶NO(g)+N(g)O3∗(g)+M(g)⟶O3(g)+M∗(g)
- Q For a 0.0299 M aqueoussolution of aniline, C6H5NH2(Kb = 7.4E-10), determine the following. Kw =1.0E-14.What are the major andminor species present? Include phase.What is the majorspecies (other than water)?What is...
- Q What is the final temperature when 76.8 g of water at 73.1°C ismixed with 21.5 g of water at 29.5°C? (The specific heat of wateris 4.184 J/g·°C.)
- Q Prelab question for Determination of the Universal Gas Constant,R:How does collecting the oxygen over water affect the volume ofgas collected? Why does this happen?Please be specific and answer this question...
- Q Now consider the reaction when 45.0 g NaOH have been added. Whatamount of NaOH is this, and what amount of FeCl3 can beconsumed by it?___________mol NaOH available__________mol FeCl3 that can...
- Q Write balanced molecular, ionic, and net ionic equations withstates of matter.1.) sodium carbonate + ammonium iodide2.) iron (iii) chloride + ammonium iodide3.) iron (iii) chloride + copper (ii) sulfate4.) ammonium...
- Q Titrate 40.0 mL of 0.0350 M benzoic acid (C6H5COOH, Ka = 6.3 ×10–5) with 0.0700 M NaOH Calculate the pH in the solution afteraddition of 25.0 mL of 0.0700 M...
- Q IN MICHAELIS MENTEN GRAPH, HOW WOULD YOU INCREASEVELOCITY BEYOND Vmax?
- Q Discuss the use of Lanthanide shift reagents (LSR) in NMRspectroscopy, both how it works and why it is important.
- Q Concentration of NaOH solution= 0.02803 MConcentration of Crystal Violet dye solution=0.001 MRoom Temperature =25 degree celciusAbsorbance from the device- spectrovis(spectrophotometer)The data in the trials are the absorbance.-Its not Organic chemistry....
- Q What is the expected alkyl bromide product fromreaction: 3-methyl-1-butanol with HBr
- Q Consider the octahedral crystal fields below:Cr3+ High-spin Cr2+ Cu2+ Lowspin Co3+a) determine which metal ions would be expected to undergoJahn-Teller distortion (maybe more than 1 answer)b) determine which metal ions...
- Q A student performs a spectrophotometric analysis using standardaddition calibration and obtains a linear relationship with a slopeof 1.00 a.u./ppm and a y-intercept of 0.960 a.u. What is thex-intercept of the...
- Q A 5mL blood sample is treated with trichloroacetic acid forprotein precipitation. After centrifugation, the remaining solutionis taken to pH 3 and extracted with two portions of 5.00 mL methylisobutyl ketone,...
- Q Methane (CH4) gas flows into a combustion chamber at a rate of200 L/min at 1.50 atm and ambient temperature. Air is added to thechamber at 1.00 atm and the same...
- Q For a 0.0301 M aqueoussolution of aniline, C6H5NH2(Kb = 7.4E-10), determine the following. Kw =1.0E-14.What are the major andminor species present? Include phase.What is the majorspecies (other than water)?What is...
- Q I have having trouble with data table 4 and i would like someoneto double check my work on the other tables.NaHCO3(s) + HC2H3O2(aq) → C2H3O2Na(aq) +H2CO3(aq) H2CO3(aq)→H2O(l) +CO2(g)Note: 5 mL...
- Q 21. Assume that spherical particles with diameter=100 μm anddensity=1.1 g/cm3 have sedimentation velocity of 1 cm/min in asolution with density=1 g/cm3. What is the sedimentation velocityof spherical particles with diameter=50...
- Q 1) how many valence electron are in the electron-dotstructure of H2O2) in a molecule with covalent bonding3) which of the following polyatomic ions has a 3-ioniccharge4) Fe2(SO4)3 is called5) the...
- Q Calculate the molarity of each of the following solutions.Part A4.15 mol of LiCl in 2.70 L solutionPart B26.13 g C6H12O6 in 1.09 L of solutionPart C31.0 mg NaCl in 124.5...
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