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GaAs and GaP (Eg = 2.26 eV) make solid solutions that have the same crystal structure as the parent materials, with As and P randomly distributed throughout the crystal GaPxAs1-x Exists for any value of x. If we assume that the band gap varies linearly with composition between x = 0 and x =1, estimate the band gap for GaP0.5As0.5 .What wavelength of light does this correspond to?
Question- Use the curved arrow notation to draw the mechanism of the reaction of acetone and cis-1,2- cyclohexanediol in the presence of hydrochloric acid to form the acetonide 3
Use the following information to find H °f of gaseous HCl: N2(g) + 3H2(g) ? 2NH3(g) ?H°rxn = - 91.8 kJ N2(g) + 4H2(g) + Cl2(g) ? 2NH4Cl(s) ?H°rxn = - 628.8 kJ NH3(g) + HCl(g) ? NH4Cl(s) ?H°rxn = - 176.2 kJ
Question- Does anyone know if you can use colorimetric titration (EDTA) to test lead, nitrate, magnesium, chlorine in drinking water. If so can you provide with a procedure for each and how to calculate mg/l, ppm for each.
two beakers are placed in a sealed box at 25 . one beaker contains 30.0 of a 5.5times10?2 aqueous solution of a
For my prelab questions I was asked "During the work up, the product layer is washed one with water, once with 5% sodium bicarbonate solution, and once again with water. What is the purpose of these washings".
The system then re-equilibrates. The appropriate chemical equation is PCl3+Cl2PCl5. Calculate the new partial pressures after equilibrium is re-established
the temperature of the solution increases to 26.5 C. Calculate the enthalpy change, Delta H, for this reaction per mole of X. Assume that the specific heat and density of the resulting solution are equal to those of water
A saturated solution of Mg(OH)2 in contact with undissolved Mg(OH)2(s) is prepared at 25 degrees C. The pH of the solution is found to be 10.17.
What is recorded as the final temperature (in oC) on a constant pressure calorimeter if 12.404 g of potassium hydroxide is dissolved in 28.663 mL of water originally at 22.738oC?
A student has a sample (less than 100 mg) that she would like to test for presence of lead. She has access two different atomic absorption spectrometers (flame and furnace) that could be used for analysis.
If you're preferred pH is 7.55 then compute how much HA wants to be added to 50.00mL of A- to create this buffer. Provide your answer in mLs to the hundredth decimal point.
cobalt-60 has a halflife of 5.26 yr. the cobalt-60 in a radio therapy unit must be replaced when its radioactivity
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