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The emission from C can be used for wavelength calibration of instruments in the ultraviolet. This is generally performed by electron-impact initiated decomposition of a precursor resulting in the prodiction of electronically excited C, which relaxes to the ground electronic state by emitting a photon at 193.09nm.
Suppose one wated to take another approach where C is heated until 5% of the atoms occupy the electronically excited state. Consedering only the lowest-energy ground state and the elctronically excited state, what temperature is required to achieve this excited-state population?
The atmospheric pressure 4.The volume for the vapor to occupy above the liquid 5.The temperature of the liquid
A portable photometer with a linear response to radiation registered 73.6 μA with a blank solution in the light path. Replacement of the blank with an absorbing solution yielded a response of 24.9 μA. Calculate
Water supply in a city is fluoridated by adding NaF. The preferred concentration of F- is 1.6ppm.calculate the amount of Naf in milligrams should be added per gallon (treated water) if the water supply is 0.2 ppm in F-?
The atomic mass of element X is 22.99 amu. A 19.98-g sample of X combines with 16.51 g of another element Y to form a compound XY. Calculate the atomic mass of Y.
How much heat energy, in kilojoules, is required to convert 65.0g of ice at 18.0 degrees celcius to water at 25.0 degrees celcius.
The water level in a graduated cylinder initially at 210 rises to 277 after a piece of lead is submerged. What is the mass in grams of the lead.
Dalton law of partial pressure - The partial pressure of oxygen is maintained at 0.20 atm at this depth
A laser pulse with wavelength 555nm contains 4.40mJ of energy. How many photons are in the laser pulse.
Assume that 120 grams of CH 3CH 2OH at 29 degree Celsius temperature is added with 250 grams of CH 3CH 2OH at 85 degree Celsius degree Celsius at constant pressure of atmosphere.
A 4.80 g nugget of pure gold absorbed 276 J of heat. What was the final temperature of the gold if the initial temperature was 26.0°C?
20ml of 0.15M H3PO4 is required to neutralize 40ml of a KOH solution. The molarity of the KOH solution is?
An unidentified organic compound X, containing C,H, and O was subjected to combustion analysis. When 228.4 mg of pure X was burned 627.4 mg of CO2 and 171.2 mg of H2O were obtained.
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