Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
A photocell is a device used to measure the intensity of light. It works because photons that hit the photocell cause electrons to move through the cell's circuits. In other words the light energy is changed into electricity. Rember, electricity (or current) is just the flow of electrons. In a certain experiment when light of wavelenght 630 nm is directed onto a photocell a current (of electricity) is produced at a rate of 2.6x10^-12 C/s (Coulombs per second). Assume that each photon that hits the cell causes one electron to be emitted. The charge on each electron is 1.602x10^-19 C (Coulombs).
A. How many photons per second are striking the photocell?
B. How much energy is mJ/s (millijoules per second) is the photocell absorbing?
95.0 mL of H_2O is initially at room temperature (22.0C). A chilled steel rod at 2.0C is placed in the water. If the final temperature of the system is 21.5C, what is the mass of the steel bar?
calculated using the energy level equation. A Li2+ ion emitted a photon with a wavelength of 11.4 nm to reach an energy level with n=1. What was the value of n for its initial energy level?
Atomic absorption spectrometry was used with the method of standard additions to determine the concentration of cadmium in a sample of an industrial waste stream. For the addition, 5.00 ?L of a 1000.0 ?g/mL
It takes 45.0 to raise the temperature of an 8.00 piece of unknown metal from 13.0 to 24.5. What is the specific heat for the metal.
Write the net ionic equation for the neutralization of the bases, magnesium hydroxide, Mg(OH)2 and aluminum hydroxide, Al(OH)3, found in Maalox, for example, with acid (H+).
Metals such as magnesium and zinc react with dilute sulfuric acid to give hydrogen, according to the equation: M (s) + H2SO4 (aq) -------> MSO4 (aq) + H2 (g) When 5.00 g of a mixture of powdered magnesium and zinc were dissolved in diluted sulfuri..
Calculate the amount of energy released in the formation of one mole of BaO bonds(not Lattice energy) The radius of the barium ion is 1.35 Angestrom
A thief plans to steal a gold sphere with a radius of 28.8 cm from a museum. If the gold has a density of 19.3 {rm g/cm}^3, what is the mass of the sphere? [The volume of a sphere is V = (4/3)pi r^3.]
A company is marketing a photovoltaic cell that it claims has an output of 320 W/m2 when tested at the standard 1000 W/m2 irradiation condition
How much PV work is done (in kilojoules) and what is the value of deltaE (in kilojoules) for the reaction of 6.50g of acetylene at atmospheric pressure if the volume change is -2.80 L?
Calculate the mass of silver chloride required to plate 215 mg of pure silver if silver chloride contains 75.27% Ag.
It takes 49.0 to raise the temperature of an 8.00 piece of unknown metal from 13.0 to 24.5. What is the specific heat for the metal?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd