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A ruby laser produces radiation of wavelength 633 nm in pulses whose duration is 2.00 x 10-9 s. Of each pulse contains 1.20 x 1018 photons, what is energy of each pulse?
You have a choice of a p-20 ,p-100,p-200,p-1000,a 1mL serological pipette , and a 5mL serological pipette. Which one(s) would you choose to make this standard and why? Explain how you would calibrate the pipette(s) you choose.
460. mL of hydrochloric acid (HCl) acid is exactly neutralized with 485 mL 0.660 M NaOH solution. What is the concentration of the acid solution.
Compute the porosity of a consolidated limestone at 4000 psi, presuming it has a porosity of 0.20 at 500 psi.
For a protein w/ a molar mass of 1x10 6 u, calculate the molar concentration required to obtain an osmotic pressure of 10 matm at 25 degrees C.______M
A first order reaction has a half life of 26.4 sec. How long will it take for the concentration of the reactant to fall to 1/8 of its original value
the brown gas no2 and the colorless gas n2o4 exist in equilibrium 2no2 lt----gt n2o4. in an experiment 0.625 mole of
While a piece of metal is irradiated with UV radiation, electrons are ejected with a kinetic energy of 5.96 x 10-19 J. Explain what is the work function of the metal
a thermodynamic study of DyCl3 determined its standard enthalpy of formation from the following information. Determine delta (subscript f) H for DyCl3 from the following reaction enthalpies
A balloon filled with 5.00 L of He is under 3.00 atm of pressure at 315 K. What will happen to the volume of the gas if the temperature drops to 255 K and the pressure changes to 1.50 atm.
Substituents on an aromatic ring can have several effects on electrophilic aromatic substitution reactions. Substituents can activate or deactivate the ring to substitution,
Regard as an adult who drinks two martinis with lunch. Approximate the blood alcohol concentration in this person after two martinis have been consumed an adult with a blood alcohol concentration of 3.0 X 10 (-3) g/mL or more is considered intoxic..
In a Electrode Potential/Cell Reaction lab you conduct an experiment with a voltmeter connected to two electrodes, two solutions in beakers, and a salt bridge connecting them.
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