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when electrons move from the fourth energy level to the second energy level, they emit visible light. explain why the light emitted when an electron makes this move in a sodium atom is a different color than the light emitted by an electron moving from fourth to the second level of a hydrogen atom
During an extraction a student loses track of which layer is the organic layer. How could she determine which layer is the aqueous phase?
how many moles can be produced from 2.5 moles of Ag2CO3 and final temperature of the calorimeter contents is 23.83°C After dissolution of the salt.
Your Discussion should address at least the following points: 1. What is the structure of each isomer? 2. Which ligands are observed in the IR spectra of the four complexes which you have prepared? What are the symmetries of the ligands in each co..
the partial pressure of oxygen in air at sea level is 0.21 atm. using the data in table 13.2, together with henry's law, calculate the molar concentration of oxygen, in the surface water of a mountain lake saturated with air at 20 degrees celcius ..
added 5 mL of 0.10 M H2SO4 instead of 5mL 0.10 M of HCl calculate the ph of the solution using henderson-hasselbalch
a cell depositing Cu from a Cu2+ bath operates for 10 hours with an average current of 5.8 A. if 65.3 g of copper is deposited, at what efficiency is the cell operating?
If the mobile phase flow rate is 0.4 m/min, what is the analyte linear migration rate, and how long is the column?
Sodium methoxide reaction: Pipet 1.65 mL of a 25% (by weight) solution of sodium methoxide in methanol into a 10 mL reaction flask.
If 2.45 g of X reacts with 6.55 g of M to produce 11.25 g of a compound with the formula M2X3, and the atomic mass of M is 42.0 amu, what is the atomic mass of X
Differentiation between cis and tran isomers when it comes to cyclohexane. drawing the chair confermation and understanding "up"
The peak absorbance of the first chromatographic peak at 300nm was 0.020 and at 350nm 0.030. What is the main component of the first eluting peak and what percentage of the total absorbance at 300nm is due to this component?(assuming the light pat..
Calculate the pH at the equivalence point in titrating 0.120 M solutions of each of the following with 8.0* 10^-2 M NaOH
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