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A diode laser emits at a wavelength of 987 nm.
(a) In what portion of the electromagnetic spectrum is this radiation found?
(b) All of its output energy is absorbed in a detector that measures a total energy of 0.52 J over a period of 32 s. How many photons per second are being emitted by the laser?
calculate the molarity of the following solutionsa5.6 mol of sodium chloride dissolved to form 25 l of solution.b5.6 g
Assume the caffeine solution is 15 mg of caffeine per mL. A student used 5 mL of caffeine solution in both part A and part B. Crude yields was 68 mg from the dichloromethane extract and 47mg from the MTBE extract.
What is the pressure in millimeters of mercury of 0.0115 mol of helium gas with a volume of 219 mL at a temperature of 55 circ C?
What is the pH of a buffer solution that is 0.255 M in lactic acid and 0.333 M in sodium lactate? The Ka of lactic acid is 1.4 × 10-4.
Explain what is the theoretical yield of chromium that can be produced by the reaction of 40.0 g of Cr2O3 with 8.00 g of aluminum according to the chemical equation
Problem- Part 1) Compounds Y and Z both have the formula C9H18. Both Y and Z react with one molar equivalent of hydrogen in the presence of a palladium catalyst to form 2-methyloctane. The heat of hydrogenation of Y is less than that of Z. Y and Z..
If a second-period diatomic molecule has 13 electrons in its valence shell (total of 2s and 2p electrons), what is the predicted bond order of the molecule
What is the magnitude of the change in pH when 0.005 moles of HCl is added to 0.100 L of a buffer solution that is 0.100 M in CH3CO2H and 0.100 M NaCH3CO2?
Calculate the % atom economy for the following two methods for converting benzene, C6H6, to aniline, C6H5NH2. Method 1: C6H6 + (CH3)3SiN3 + 2 F3CSO3H + NaOH
Compound A has the molecular formula C14H25Br and was obtained by reaction of sodium acetylide with 1,12-dibromododecane. On treatment of compound A with sodium amide
Find the predicted value for an unmeasured point for: Grahams law, find the rate for butane, C4H10
For a large batch of nails, a manufacturer needs to plate a total zinc mass of 1.40kg on the surface to get adequate coverage. How many moles of zinc are in 1.40kg of zinc?
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