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4. Using the concepts of bond energy and bond lengths explain (0) why materials usually expand...
please explain all, thanks! 4. (60 pts) A particle in an infinite square well of width...
please explain all, thanks!
4. (60 pts) A particle in an infinite square well of width L has an initial wave function (x,t = 0) = Ax(L - x)2, OSX SL a) Find y(x, t) fort > 0. You first have to normalize the wave function. Hint: this is best expressed an infinite series: show that the wave function coefficients are on = * 31% (12 – n?)(1-(-1)") → (n = 87315 (12 - nºre?); n odd. b) Which energy...
1. Using basic electrostatic arguments, explain why an electron “in” the 2s orbital of neon is...
1. Using basic electrostatic arguments, explain why an electron “in” the 2s orbital of neon is of higher potential energy than it would be “in” the 1s orbital. 2. Explain why is it that periods 2 and 3 of the periodic table have 8 elements apiece while periods 4 and 5 have 18 elements and why aren't there 18 elements in period 3? 3. How many orbitals exists when n=5, l=3? What are these orbitals called? Are these orbitals degenerate?...
4. (a) What is cold work and its significance in material properties. (b) Briefly explain why...
4. (a) What is cold work and its significance in material properties. (b) Briefly explain why cold-worked metals are more susceptible to corrosion than noncold-worked metals. (c) A cylindrical rod of 1040 steel originally 15.2 mm in diameter is to be cold worked by drawing; the circular cross section will be maintained during deformation. A cold-worked tensile strength in excess of 840 MPa was applied. Determine the percent cold work if the final diameter must be 10 mm. [20 pts]
activation energy 4. Using your understanding of enzymes and substrates, explain why a solution containing numerous...
activation energy 4. Using your understanding of enzymes and substrates, explain why a solution containing numerous enzymes from a yeast cell can be used when testing the activity of a single enzyme like sucrase like we did in our laboratory exercise today. (1)
4. (5 points) Why is the first ionization energy for cesium lower than xenon? Explain your...
4. (5 points) Why is the first ionization energy for cesium lower than xenon? Explain your reasoning. 25 He first ionization energy (eV) Rn Rb Cs 0 10 20 30 40 50 60 70 80 90 atomic number
1. Why do ions like Na+ and Cl- tend to stick together? What kind of bond...
1. Why do ions like Na+ and Cl- tend to stick together? What kind of bond results from this force? 2. Why do the nuclei of an oxygen atom and two hydrogen atoms remain close together in the structure of a water molecule? What is more stable about a molecule of H2O than three separate atoms of O, H, and H? 3.How is the force holding the water molecule together different from an ionic bond? 4. What makes the covalent...
In questions 2-4, you may use radius comparisons as given information. IONIZATION ENERGY. Ionization energy refers...
In questions 2-4, you may use radius comparisons as given information. IONIZATION ENERGY. Ionization energy refers to energy required to remove an outer electron from an isolated atom. The energy tends to be less for elements with weaker attractions to the nucleus or higher initial energy levels. The general trend is for lower energy for elements lower in columns and higher energy from left to right across rows of the periodic table. There are some notable exceptions. Explain why: 2....
4 pts) Explain in płysical terms why, in many-electron atoms, the 2s orbital is lower in...
4 pts) Explain in płysical terms why, in many-electron atoms, the 2s orbital is lower in energy than the.2p sublevel, and thus get filled first in the Aufbau process 19. 20. (4 pts.) Remember the problem of counting configurations for a box of coins that are either heads-up or tails- up. What is the entropy of an entire mole of spin 1-1/2 particles in units J/K Use Stirling's approximation Inx!xInx-x b) in the all-spins-up configuration? Note: TAS would represent the...
Examll Unlt3: Chap17-18: Aqueous equilibrium-Free Energy and Thermodynamice: CHEM-1312-501 4/4/20...
Can you explain why the answers are correct.
Examll Unlt3: Chap17-18: Aqueous equilibrium-Free Energy and Thermodynamice: CHEM-1312-501 4/4/2019 Identify the compound that is acid-insoluble. Ca3iP04)2 orrect Answer As2S3 PbC12 Fes 0/6 pts Question 4 Identify the compound that is base-insoluble. KCi Ca3íP04)2 PbCl2 Sb253 orrect Answer NiS 0/6 pts Question 13 0/6 pts Calculate the AG using the following information. 2 HNO3(aq) + NO(g) → 3 NO2(g) + H2O(l) ΔG"m= ? G"f (kJ/mol)-1 10.9 87.6 51.3-237.1 t Answer +51.0k 54.5...
Question 4 10 Marks (a) Why is share valuation more difficult than bond valuation? Explain. (4...
Question 4 10 Marks (a) Why is share valuation more difficult than bond valuation? Explain. (4 marks) (b) GMX Ltd is a fast-growing company. The company expects to grow at a rate of 25% in the first two years, and then by 10% for the next three years. Followed by this, the company is expected to settle to a constant growth rate of 4%. The first dividend is expected to be paid next year and it will equal $4. What...
please explain all, thanks!
4. (60 pts) A particle in an infinite square well of width L has an initial wave function (x,t = 0) = Ax(L - x)2, OSX SL a) Find y(x, t) fort > 0. You first have to normalize the wave function. Hint: this is best expressed an infinite series: show that the wave function coefficients are on = * 31% (12 – n?)(1-(-1)") → (n = 87315 (12 - nºre?); n odd. b) Which energy...
4. (a) What is cold work and its significance in material properties. (b) Briefly explain why cold-worked metals are more susceptible to corrosion than noncold-worked metals. (c) A cylindrical rod of 1040 steel originally 15.2 mm in diameter is to be cold worked by drawing; the circular cross section will be maintained during deformation. A cold-worked tensile strength in excess of 840 MPa was applied. Determine the percent cold work if the final diameter must be 10 mm. [20 pts]
activation energy 4. Using your understanding of enzymes and substrates, explain why a solution containing numerous enzymes from a yeast cell can be used when testing the activity of a single enzyme like sucrase like we did in our laboratory exercise today. (1)
4. (5 points) Why is the first ionization energy for cesium lower than xenon? Explain your reasoning. 25 He first ionization energy (eV) Rn Rb Cs 0 10 20 30 40 50 60 70 80 90 atomic number
In questions 2-4, you may use radius comparisons as given information. IONIZATION ENERGY. Ionization energy refers to energy required to remove an outer electron from an isolated atom. The energy tends to be less for elements with weaker attractions to the nucleus or higher initial energy levels. The general trend is for lower energy for elements lower in columns and higher energy from left to right across rows of the periodic table. There are some notable exceptions. Explain why: 2....
4 pts) Explain in płysical terms why, in many-electron atoms, the 2s orbital is lower in energy than the.2p sublevel, and thus get filled first in the Aufbau process 19. 20. (4 pts.) Remember the problem of counting configurations for a box of coins that are either heads-up or tails- up. What is the entropy of an entire mole of spin 1-1/2 particles in units J/K Use Stirling's approximation Inx!xInx-x b) in the all-spins-up configuration? Note: TAS would represent the...
Can you explain why the answers are correct.
Examll Unlt3: Chap17-18: Aqueous equilibrium-Free Energy and Thermodynamice: CHEM-1312-501 4/4/2019 Identify the compound that is acid-insoluble. Ca3iP04)2 orrect Answer As2S3 PbC12 Fes 0/6 pts Question 4 Identify the compound that is base-insoluble. KCi Ca3íP04)2 PbCl2 Sb253 orrect Answer NiS 0/6 pts Question 13 0/6 pts Calculate the AG using the following information. 2 HNO3(aq) + NO(g) → 3 NO2(g) + H2O(l) ΔG"m= ? G"f (kJ/mol)-1 10.9 87.6 51.3-237.1 t Answer +51.0k 54.5...
Question 4 10 Marks (a) Why is share valuation more difficult than bond valuation? Explain. (4 marks) (b) GMX Ltd is a fast-growing company. The company expects to grow at a rate of 25% in the first two years, and then by 10% for the next three years. Followed by this, the company is expected to settle to a constant growth rate of 4%. The first dividend is expected to be paid next year and it will equal $4. What...
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