When a metal was exposed to photons at a frequency of 1.07 x 1015 s-, electrons were emitted with a maximum kinetic energy of 3.70 x 10-19 J Calculate the work function, 0, of this metal. What is the maximum number of electrons that could be ejected from this metal by a burst of photons (at some other frequency) with a total energy of 9.27 x 10-7 J? number of electrons:

When a metal was exposed to photons at a frequency of 1.07 x 1015 s-, electrons were emitted with a maximum kinetic energy of 3.70 x 10-19 J Calculate the work function, 0, of this metal. What is the maximum number of electrons that could be ejected from this metal by a burst of photons (at some other frequency) with a total energy of 9.27 x 10-7 J? number of electrons:

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter2: Molecules Of Life

Section: Chapter Questions

Problem 3CT: Polonium is a rare element with 33 radioisotopes. The most common one, 210Po, has 82 protons and 128...

See similar textbooks

Similar questions

A reaction at 23°C has ∆G = 1 kJ mol–¹. Why might this reaction become spontaneous at 37°C?
The following reaction plays a key role in the destruction of ozone in the atmosphere: Cl(g)+ O3 (g)-> ClO(g)+O2 (g) Given the standard molar entropies (S°) below, calculate the ΔS for this reaction. S°C1O = 218.9 J/mol*K S°O3 = 238.8 J/mol*K S°Cl = 165.2 J/mol*K S°O2= 205.0 J/mol*K _______ J/K = ΔS
For the following reaction 3 experiments have been run and the data collected is in the following table @ 35 degrees Celsius 2 NO2F(g) ---> 2 NO2(g) + F2(g) Experiment [NO2F], M Rates, M/s 1 0.263 0.168 2 0.349 0.223 3 0.421 0.269 a) How long will it take for a 65% NO2F solution to become a 31% NO2F solution @35 degrees Celsius?(Hint: Use mass ratios and assume ~1g/ml for density of solutions to get you started) b) It has been determined that at 75 degrees Celsius the rate constant is 1.046 s-1. Calculate the activation energy for the decomposition of NO2F. [Hint: ]ln?1?2=?a?(1?2―1?1) c) What is the half-life of a 35% solution of NO2F @ 35 degrees Celsius?
For the reaction A → B at 298 K, the change in enthalpy is −7 kJ · mol−1and the change in entropy is −25 J · K−1 · mol−1. Is the reaction spontaneous? If not, should the temperature be increased or decreased to make the reaction spontaneous?
Consider the generic reaction2A+3B→2C,ΔHrxn=−100⁢kJIf a reaction mixture initially contains 5 mol of A and 6 mol of B, how much heat (in kJ) will have evolved once the reaction has occurred to the greatest extent possible? 150kj 200kj 300kj 100kJ
Consider the following chemical equation whose delta(G) = 9kcal/mol: AC + BD ---> AB + CD what are the reactants and what are the products is this reaction spontaneous? How do you know? Is energy released or consumed by this reaction? If an enzyme, which catalyzes this reaction is added, what will happen to delta (G) If this reaction is coupled to another reaction, whose delta(G) is -12 kcal/mol, what will be the net delta(G) value? will the overall reaction be spontaneous
Consider a reaction with ΔH = 15 kJ and ΔS = 50 J · K−1. Is the reaction spontaneous (a) at 10°C, (b) at 80°C?
Calculate ΔG° (answer in kJ/mol) for each of the following reactions from the equilibrium constant at the temperature given. (d)CoO(s)+CO(g)⇌Co(s)+CO2(g) T=550°C Kp=4.90×102 (e)CH3NH2(aq)+H2O(l)⟶CH3NH3+(aq)+OH−(aq) T=25°C Kp=4.4×10−4 (f)PbI2(s)⟶Pb2+(aq)+2I−(aq) T=25°C Kp=8.7×10
The standard heat of combustion of liquid methyl cyclopentane, C6H12(l),C6H12(l), was measured to be −3937.7 kJ/mol.−3937.7 kJ/mol. What is Δ?̂ ∘f C6H12(l),ΔH^f C6H12(l)∘, the standard heat of formation of liquid methyl cyclopentane?
Consider the following process: NaCl(s) water−→−−water→ Na+(aq) + Cl-(aq); ΔH = +4.2 kJ/mol Under what conditions (temperature) would you expect this process to be spontaneous? Select a relatively high temperature and a relatively low temperature, calculate (estimate) the relative values of ΔG to support your conclusion. The entropy increases in this process Please insert an image of your work
The formation constants at 25°C for Fe(CN)4-6 and Fe(EDTA)2– are 1.00 x 1037 and 2.10 x 1014, respectively. Answer the questions below. 1) Calculate K under standard conditions for the reaction Fe(EDTA)2−(aq) + 6CN−(aq) ----> Fe(CN)4−6(aq) + EDTA4−(aq) 2) Calculate ΔG° for the reaction. (kJ/mol)
If we alter the kinetics of a reaction by increasing Km but leaving Vmax alone, how will the L-B plot change?