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Problem- A light emitting diode emits photons with an energy of 3.221 x 10^-19 J. What is the energy per mole of photons emitted. Ans. 1.94 x 10^5 J/mol.
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Calculate the number of moles of barium chloride in 427g of a 3.17% by mass barium chloride solution?
What is the chemical formula for the compound containing one nitrogen atom for every three iodine atoms.
Hydrazine, N2H4, is dibasic and has Kb1 = 3.35x10-7 and Kb2 = 1.42x10-16. Calculate the concentration of OH- ions in a 29.91 M aqueous solution of hydrazine. Express your answer in mM.
Suppose that you take .5000 gram of Na2CO3 and titrate it with .115M HCL solution. What is the equivalence point volume expected for the complete titration? (Formula weights Na2CO3 = 105.99g/mol and HCL = 36.46g/mol)
What is an example of a cell diagram for a voltaic cell? How do I calculate the standard cell potential for the example of the voltaic cell?
When benzene (C6H6 ) reacts with bromine (Br2 ), bromobenzene (C6H5Br ) is obtained: C6H6+Br2→C6H5Br+HBr What is the theoretical yield of bromobenzene in this reaction when 28.0 g of benzene reacts with 60.7 g of bromine ...
You are required to read the following case study and prepare a Project Feasibility Study and Timeline based on the information contained in the case study. Residential Duplex Development Project You own a real estate ...
Upon decomposition, one sample of magnesium fluoride produced 2.55 kg of magnesium and 3.99kg of fluorine. A second sample produced 1.40 kg of magnesium. How much fluorine (in grams) did the second sample produce?
What will happen if I decide to test the solubility of sodium chloride in ethanol which is less polar than water.
What was the initial energy level of an electron if it was excited by a photon of wavelength 38.9µm and jumped to an energy level of 10?
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