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An electron in hydrogen atom in its ground state absorbs 1.5 times as much energy as the minimum required for it to escape from the atom. What is the wavelength of the emitted photon?
Just give me an understandable ans. No limit of words n all. I find chemistry a bit tough. I understand the entire theory but i cant solve numericals. My chem sir at times appreciates me as i m the only one answering correctly in the class. I am very worried as i get very less marks in my tests.
Problem- A 500 mg die A 500mg dietary supplement of L-lysine (an amino acid, 146.2 g/mol) required 68.4 mL of 0.100 M NaOH to reach the end point. How many protons were removed for each L-lysine molecule in this titration
calculate the pH of a solution contaning 0.2m acetic acid (pka=4.7) and 0.1 m sodium acetate? a. write the equation ph=pka+log [A-]/[HA]
The heat of vaporization of Freon, CCl2F2, is 17.2 kJ/mol at 25* C. What is the change of entropy for one mole of liquid Freon when it vaporizes at 25*C
Gold has a density of 19.3 g/cm3. How many pounds does a gold sphere weigh if it has a diameter of 5.20 inches?
Assuming the activation energies are equal, which of the following reactions will proceed at a higher rate at 50 degrees celsius? WHY?
Compute percent of purity of alum, presence of aluminum, potassium & sulphate in the sample. The mass of aluminum & potassium in the sample analyzed.
coal can be used to generate hydrogen gas a potential fuel by the following endothermic reaction.cs h2og lt gt cog
The solubility product constant for AgCl at 298 K is 1.82 × 10-10. Calculate E° for the process AgCl+e----->Ag+Cl given that the standard reduction potential of the half-reaction Ag++e----->Ag is +.799V
Convert lb mol CaC2 feed to lb and calculate lb inerts added. The total lb solids in the slurry is then the sum of the Ca(OH)2 plus inerts. In calculating the water added, remember that some is consumed in the reaction.]
A student performing a titration added 40.35mL of 0.250 M NaOH to completely neutralize a solution of HCl. How many moles of HCl were present prior to titration with NaOH.
In the Anfinsen experiment refolding of RNase subsequent its denaturation with urea and beta-mercaptoethanol resulted in fully functional enzyme. conversely, denatured proteins do not always restart proper folding in vitro. Provide a possible scen..
Naturally occuring chlorine has two isotopes, Cl-35, which has an atomic mass of 34.969 amu and Cl-37. If the average atomic mass of chlorine is 35.46 amu and its natural abundance is 75.53%,
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