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Question- Consider when a clean surface of silver is irradiated with light of wavelength 230nm, the kinetic energy of the ejected electrons to be .805 ev. Calculate the work function and the threshold frequency of the silver?
I am stuck in between this question please help me out
a 0.9157-g mixture of cabr2 and nabr is dissolved in water and agno3 is added to the solution to form agbr precipitate.
if the reaction produces 5.72 grams of a compound called magnesium ammonium phosphate,MgNH4PO4. what is the percentage of phosphorus in the original plant food sample?
the the temp gets down to 40F at night, what is the maximum allowable density of water in the room during the day when the room is 70F
an extended source emits 2.00 w cm-2 sr-1 nm-1 at 300 nm. calculate the spectral radiant power impingent on a 1.00 cm2
A 0.1964 g sample of quinone (C6H4O2) is burned in a bomb calorimeter that has a heat capacity of 1.56 kJ/ Celsius. The temperature of the calorimeter increases by 3.2 Celsius. Compute the energy of combustion of quinone per gram and per mole.
State whether each of the following properties of the main group elements generally increases or decreases a) From left to right across a period b) From top to bottom within a group- metallic character, atomic size, ionization energy, acidity of oxid..
calculate the amount of heat needed to boil 92g of ethanol beginning from a temperature of -69.2 c . be sure your
The rate law for the reaction, 2NO(g) + O2(g) -- 2NO2(g), is found to be: rate of reaction=k[NO]2[O2]2 (PLEASE note that the 2's after the concentrations are powers, so we have NO to the power of 2 and O2 to the power of
Write the complete balanced molecular, ionic, and net ionic equations for the reaction of potassium phosphate + aluminum nitrate. Which product, if any, is a precipitate
For the Ca2+ and F- ions, write the mathematical relations defining activity of each ion in terms of its concentration and activity coefficient. e) Based on your answers above, derive a relationship for Ksp' in terms of Kspo and activity coefficie..
The cells were treated first with glucagon. Then the glucagon was removed and insulin added. This time the glycogen formed contained BOTH radioactive carbon and hydrogen. Explain the results of the two experiments.
a stone is thrown downward with a velocity of 66 feet per secound 45mph from a bridge that is 120 feet above the
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