Chemistry question and answers for July 06, 2023
- Q In the Short-Lived Isotope section, you used ametastable isotope. Define what metastable isotopes are and howBa-137m differs from Ba-137. What applications are Ba-137 orBa-137m used for?
- Q Consider the formation of hydrogen fluoride:H2(g) + F2(g) ↔ 2HF(g)If a 3.8 L nickel reaction container (glass cannot be used becauseit reacts with HF) filled with 0.0054 M H2 is...
- Q 16. A solution is made by adding 0.500 mols of NaF and 0.500mols of KCN to 0.75L of water. What will the pH of this solutionbe? You may need to...
- Q For the following reaction: H2(g) +I2(g)<--->2HI(g)Â Â Â Â ; Kc=49.5The beginning concentrations are: H2: 0.10M, I2: 0.050M, andHI:0Assume this reaction is not at equilibrium. When it does reachequilibrium, what will the concentrations...
- Q Gold has a face-centered cubic arrangement with a unit cell edgelength of 4.08 Ã… . How many moles of gold fit in a goldnanoparticle sheet with a length of 57.3...
- Q The Water Treatment Plant and the University Water TreatmentPlant remove calcium hardness (Ca2+) by precipitating (making)CaCO3(s). If, after establishing equilibrium with CaCO3(s), thedissolved Ca2+ concentration is 10 mg/L and the...
- Q San Diego Gas & Electric provides natural gascomposed of 92 mol% methane, 7.0 mol% ethane, & 1.0 mol%nitrogen. 100 mol/hr of this gas is fed to a furnace with 30%excess...
- Q Using the definition of Ka and the Debeye-Huckelexpression for the mean ionic activitycoefficient, calculate the pH of a 0.10 M acetic acid solution in(a) pure water (b) 0.1 MNaCl and...
- Q Perform the appropriate calculation to determine the theoreticalpH of the buffer solution after 10 drops of 0.1M HCl was added. Kaof acetic acid = 1.8 x 10-5
- Q For the reaction: Fructose 6-phosphate to glucose 6-phosphate,delta G is -0.4 kcla/mol. Starting with a 0.50 M solution offructose 6-phosphate, what is the equilibrium concentration of bothfructose 6- phosphate and...
- Q please answer all 4 questions. I needbrief and correct answers. thankyou in advance.1. Why is it important to mix the solutions after adding thereagents? How is mixing done in this...
- Q how exactly do you determine the miller indices for the firstthree peaks of a diffraction pattern? for cubic it makes sense forit to be (100) (110) (111) but for less...
- Q In clinical chemistry, explain what Pyridoxal-5’-Phosphate is,and how does it work?
- Q How many milliliters of a 0.204 M HI solution are needed toreduce 24.5 mL of a 0.371 M KMnO4 solution according to thefollowing equation: 10HI + 2KMnO4 + 3H2SO4 →...
- Q please answer all 4 questions. i don'tneed a long answer. please explain them briefly andcorrectly. Thank you in advance.1. What does the term qualitative analysis mean?2. The confirmatory reactions that...
- Q 3. A pipette is used to add 46 mL of 0.1 M Pb(NO3)2 to a 294.0mL solution of 0.2 M NaF. Determine the equilibrium concentrationof Pb2+(aq) in the final solution....
- Q Give an explanation as to why Fe(II) which prefers sixcoordinate geometry might only use 3 protein ligands in the activesiteplease write clearlyor type answers
- Q At a certain temperature, the Kp for the decomposition of H2S is0.846.H​2​S(g) <---> ​H​2 (g) ​+ S(g)​  Initially, only H2S is present at a pressure of 0.161 atm in aclosed container....
- Q When 50.0 mL of 0.400 M Ca(NO3)2 is added to 50.0 mL of 0.800 MNaF, CaF2 precipitates, asshown in the net ionic equation below. The initial temperature ofboth solutions is...
- Q Calculate the pH of a buffer solution prepared by mixing 20 mLof 5.0% acetic acid with 20 mL of 0.50 M NaOH and 100 mL ofwater
- Q Part A The Haber process is typically carried out at atemperature of approximately 500∘C. What would happen to the rateof the forward reaction if the temperature were lowered to 100∘C?The...
- Q The reaction H2(g) + Br2(g) 2HBr(g) has Kc = 2.0 x 109 at 25 °C.If 0.100 mol of H2 and 0.100 mol of Br2 were placed in a 10.0 Lcontainer...
- Q Imagine that inside a cell the [creatine phosphate] = 3.5 mM,[creatine] = 0.6 mM, and [Pi] = 4.3 mM. Furthermore, imagine thatthe pH inside the cell is 7.4. Given that...
- Q If 30.0 mL of 0.150 M CaCl2 is added to 35.0 mL of 0.100 MAgNO3, what is the mass of the AgCl precipitate?
- Q A. Determine the linear density for BCC lithium, which has alattice parameter of 0.35089 nm, in the [100], [110], and [111]directions. Which of these directions is close packed?B. Determine the...
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