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A beam of 632.8 nm photons from a He-Ne laser strikes a detector area of 5.0 mm2. The laser has a flux of 3.18 x 1015 photons s-1.
(a) What is the laser radiant power in watts?
(b) What is the laser irradiance at the detector?
(c) Express the answer for part (b) in terms of photons s-1 rather than watts.
What is the specific heat capacity (in SI unit) of the following.
The mass spectrum of an organic compound shows the relative abundances of M to be 58.07% and M 1 to be 8.165%. Assuming the peaks are caused by 12C and 13C isotopes
Ligands approaching in a tetrahedral pattern cause some orbitals to be raised in energy. How many orbitals are on the lower energy level?
The combustion of 135mg of a hydrocarbon produces 440mg of CO2 and 135mg of of H2O. The molar mass of the hydrocarbon is 270 g/mol. Determine the molecular formula of this compound ?
How many grams of sodium lactate should be added to 1.00 L of 0.150 lactic acid ( or ) to form a buffer solution with = 4.10? Assume that no volume change occurs when the sodium lactate is added.
CH3CH2CH2CN can be synthesized by an SN2 reaction. Draw the structures of the alkyl chloride and nucleophile that will give this compound in highest yield.
We had to do an experiment that depolymerized PET into terephthalic acid and ethylene glycol using 1-pentanol and KOH. One of the post-lab questions is as follows:
An inflated balloon has a volume of 0.55 L at sea level (1 atm) and is allowed to rise to a height of 6.6 km, where the pressure is about 0.40 atm.
Calculate the pH of the following solutions: 1.) 0.100 moles of HF and 0.120 moles of NaF in a 1.00 liter solution.--- 2.) a solution that has 0.10M NH4NO3 and 0.10 M NH3.--- 3.)0.100 moles of HF and 0.200 moles of NaCN in 1.00 liter solution.
The crystalline form of silver (Ag) is composed of face-centered cubic unit cells. If the density of silver is 10.48 g/cm3 at room temperature,
An astronaut's spacesuit has a pinhole leak. If the spacesuit contains air of normal composition (78% nitrogen and 21% Oxygen),
A. glycerol, C3H5(HO)3 is a nonvolitile molecular liquid that is very soluable in water. A solution is made by dissolving 75.0 g of glycerol in 350 g of water. What is the freezing point of the solution
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