Question 6. a) Photons of incoming radiation have an energy of E = 2500 kJ/mol. Calculate the wavelength (in nm) of those photons. b) Would photons from part (a) be able to ionize a Be3+ ion if the electron is found in n=3? Show a calculation to support your answer. c). Consider the following balanced combustion reaction: C7H16(1) + 11 Oz(g)→ 7 CO2(g) + 8 H2O(g) A:H°= -1160 kJ/mol If the density of C7H16(1) is 0.68 g/mL, how much heat (in J and scientific notation) is released if 125 mL of C7H16(1) undergoes complete combustion?

Question 6. a) Photons of incoming radiation have an energy of E = 2500 kJ/mol. Calculate the wavelength (in nm) of those photons. b) Would photons from part (a) be able to ionize a Be3+ ion if the electron is found in n=3? Show a calculation to support your answer. c). Consider the following balanced combustion reaction: C7H16(1) + 11 Oz(g)→ 7 CO2(g) + 8 H2O(g) A:H°= -1160 kJ/mol If the density of C7H16(1) is 0.68 g/mL, how much heat (in J and scientific notation) is released if 125 mL of C7H16(1) undergoes complete combustion?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question 6. a) Photons of incoming radiation have an energy of E = 2500 kJ/mol. Calculate the wavelength (in nm) of those photons. b) Would photons from part (a) be able to ionize a Be3+ ion if the electron is found in n=3? Show a calculation to support your answer. c). Consider the following balanced combustion reaction: C7H16(1) + 11 O2(g) → 7 CO2(e) + 8 H2O(g) AcH°= -1160 kJ/mol If the density of C7H16(1) is 0.68 g/mL, how much heat (in J and scientific notation) is released if 125 mL of C7H16()) undergoes complete combustion?
I need some help with the following problem. 1a. What is the maximum number of electrons that can be emitted if a potassium surface of work function 2.40 eV absorbs 5.00 x 10-3 J of radiation at a wavelength of 325 nm? b. What is the kinetic energy and velocity of the electrons emitted?
When light of wavelength 310 nm is incident on a metal surface, electrons are ejected with a kinetic energy of 1.0 eV. a. What is the work function (binding energy) of this metal (in eV)? b. What is the cutoff wavelength of light (in nm) that can eject electrons? Will photons with wavelength 544 nm eject electrons? Explain your reasoning. c. Determine the wavelength of light (in nm) that should be used to double the kinetic energy of the electrons ejected from this surface.
11A). A sample of Uranium started with equal amounts of U235 and U238 (50% U235 and 50% U238 by count). After 1 billion years, what percentage is U235? You can use appendix B for half-lives. 11B). Photons with energy of 2.35 eV are used in a photoelectric effect experiment. The binding energy of the material used is 1.85 eV. What is the de Broglie wavelength of the ejected electrons? 11C). A spaceship has a proper length of 10.0m and is observed to travel at 0.855c relative to earth. a) What is the length of the spaceship as observed by someone on earth? b) If the spaceship has a mass of 1255 kg, what is the kinetic energy of the spaceship?
a. Determine the maximum value of the energy gap that a semiconductor, used as a photoconductor, can have if it is to be sensitive to yellow light (600 nm). b. A photodetector whose area is 5 × 10* cm’ is irradiated with yellow light whose intensity is 2 mW cm". Assuming that each photon generates one electron-hole pair, calculate the number of pairs generated per second. c. From the known energy gap of the semiconductor GaAs (E, = 1.42 eV), calculate the primary wavelength of photons emitted from this crystal as a result of electron-hole recombination. d. Is the above wavelength visible? e. Will a silicon photodetector be sensitive to the radiation from a GaAs laser? Why?
Q3. Consider an n-type silicon photoconductor which is 0.1 cm long, 1µmthick and 50 umwide. If the incident photon flux Do=1016cm-2s-1on its top surface and the absorption coefficient a=5x104cm-1, čalculate the stead photocurrent when a 5 V supply is applied across the longitudinal dimension of the sample. Assume that pn=1200cm2V-s, µp=450cm2V-sand Tn=Tp=2x10-7s
a. How much energy is required to ionize a hydrogen atom containing an electron in the n=4 level? b. What wavelength of light contains enough energy in a single photon to ionize a hydrogen atom?
a.) Find the frequency in Hertz of radiation with energy of 2.179 x 10-18 J per photon. b.) What frequency of light would be needed to make an electron in a Hydrogen atom jump from n=1 to n=3? c.) A spectral line is measured to have a wavelenght of 1000nm. Is this within the Balmer series?
1. What is the volume of a tank that can hold 18 754 Kg of methanol whose density is 0.788g/cm³? Answer in kg/cm³ Answer in g/cm³ What is the correct significant figures i. ii. iii. 2. Choose if it's carbon, nitrogen or silicon. i. iii. iv. V. Which is the largest ionization energy? Carbon, nitrogen or Silicon? Which is the largest atomic size? Carbon, nitrogen or Silicon? Which is the least electron affinity? Carbon, nitrogen or Silicon? Which is the smallest electronegativity? Carbon, nitrogen or Silicon? Which is the most non-metallic element? Carbon, nitrogen or Silicon?
4. 633 DENA 20 What would have happened if aluminium had been used instead of gold in the alpha scattering experiment? Explain your answer. C
Consider the Bohr model as applied to the following three atoms: (A) neutral hydrogen in the state n = 2; (B) singly ionized helium in the state n = 1; (C) doubly ionized lithium in the state n = 3. Part A Q Search Rank these three atoms in order of decreasing orbital radius. Rank atoms from largest to smallest Bohr radius. To rank items as equivalent, overlap them. Largest P Pearson atom A atom B atom C Reset Help Smallest Copyright © 2022 Pearson Education Inc. All rights reserved. | Terms of Use | Privacy Policy | Permissions | Contact Us | 7:18 PM 12/11/2022
The following diagram shows the complete set of orbitals of a hypothetical atom. The yellow circle represents the nucleus. Point D represents a location beyond the orbitals of this particular atom. Which of the following statements about an electron transitioning among the labeled points is TRUE? с D An electron transitioning from orbital A to orbital B will emit or absorb light with a longer wavelength than an electron transitioning from orbital B to orbital A. O The energy difference between orbitals B and C is bigger than that between orbitals A and B. To transition to a point between orbital A and B, an electron would need to absorb less energy than the difference between the energies of orbital A and B. An electron transitioning from orbital B orbital C would absorb green light. To transition from orbital C to orbital B, an electron must emit light.