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Problem- An electron in a hydrogen atom makes a transition from the n = 2 to the n = 5 state. What wavelength of radiation does the electron absorb in making this transition? (Please explain and show math!)
1) 434 nm
2) 91 nm
3) 43 nm
4) 212 nm
Solve the above problem and provide steps with explanation
Write a reaction mechanism for the adol condensation reaction betweeen p-anisaldehyde
50.0 mL of 1.0 M HCl at 25.0 oC were mixed with 50.0 mL of 1.0 M NaOH also at 25.0 oC in a styrofoam cup calorimeter. After the mixing process, the thermometer reading was at 31.9 oC.
what is the internal energy change of a gas gives off 312 of heat while being compress 862ml by a pressure of 1.64 bar?
Question- A drinking water has a calcium concentration of 17 ppm. What is the pH of this lake? It may (or may not ) help to remember that the atomic weight of calcium is 40.1 g/mol.
what will happen if a small amount of HCl is added to a 0.1M solution of HF? a. the percent ionization of HF will decrease. b. Ka for HF will increase
When heated, a 8.3 g sample of ammonium perchlorate, NH4ClO4 ignites and burns in the absence of any other material to produce N2, HCl, H2O and O2. Write the balanced chemical equation for this process and determine the mass of H2O produced.
During a photochemical smog episode in a coastal city, the steady-state concentration of oxygen radicals at ground level was measured to be 0.09 ppmv at 25 degrees celsius.
HCN is a weak acid dissolved in water. (Ka=6.2x10^-10). If a 50.0mL sample of 0.100 M HCL is titrated with 0.100 M NaOH 1) what is the pH at the equivalence point
Problem- Calculate the standard free energy of the following reactions at 25 C using standard free energies of formation
Based on their main resonance forms draw those, rank the subsequent according to the length of the C-O bonds carbon dioxide carbon ate carbon monoxide
A gaseous mixture containing 0.220 mol fraction of carbon tetrachloride (CCl4) and 0.780 mol fraction of dry air is initially at 75.0°C and 1117 mmHg
where did the energy values come from? how did you know what values to use so you could calculate the change in
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