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Question- Ultraviolet radiation of wavelength 121 nm is used to irradiate a sample of potassium metal. The work function of potassium is 2.25 eV. Calculate the speed of the electrons emitted through the photoelectric effect (x10^6 m s-1).
I am in need of complete solution for the above problem please help- me out to get right solution
To 333 milliliters of a 0.120 molar Pb(NO3)2 solution, 0.667 milliliteres of 0.435 molar KIO3 is added. Calculate the concentrations of Pb+2 and IO3- in the solution at equilibrium.
Hydrochloric acid reacts with calcium to form hydrogen and calcium chloride. If 100 grams of hydrochloric acid reacts with 100 grams of calcium, what is the limiting reagent
According to the following reaction, how many grams of ethylene (C2H4) are required for the complete reaction of 23.8 grams of hydrogen gas?
Explain which distilation method (fractional or simple) would be most appropriate to seperate hexanes and dichloromethane
A quantity of 7.031 g of an organic compound is dissolved in water to make 282.0 mL of solution. The solution has an osmotic pressure of 1.43 atm at 27°C.
It took 665.1 s for 39.88% of a substance to act in response according to first-order kinetics. Explain what is the value of the rate constant. The rate constant for a certain first-order reaction is 7.18e-3s-1. Explain what is the half-life of the..
The solution freezes at -0.085C. How many grams of urea were dissolved to make this solution? Please show work
The active ingredient in Pepto-bismol is bismuth subsalicylate, C7H5BiO4. Analysis of a 1.500-g sample of Pepto-Bismol yields 346 mg of bismuth. What percent by mass is bismuth subsalicylate. (Assume that ther is no other bismuth containing compou..
Consider the synthesis of methane from hydrogen gas and carbon at 1370mmHg and 450 C.
Approach the tank slowly and carefully carrying full face mask with portable oxygen. The characteristic odor will be evident if leaking then put on the PPE.
if a 1.201 g sample of aluminum metal is heated in a chlorine gas atmosphere the mass of aluminum chloride produced is
AT high temperatures phosgene (COCl2) decomposes to gve carbon monoxide CO and Cl2. In a typical experiment , 0.631g of COCl2 is injected ito a flask of volume 472cc. When equilibrium is established, it is found that the total pressure is 2.175atm..
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