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Pulsed lasers are nearly monochromatic radiation. Lasers that emit photons in a pulse of 5.00 ns duration with a total energy in the pulse of 0.175 at 875 nm are commerically available. a. what is the average power (energy per unit time) in units of watts (1W = 1J/s) associated with such a pulse? b. How many photons are emitted in such a pulse?
Electrochemistry and Solubility, The potential of the cell Bi|Bi2S3(s) |Bi2S3(aq)|Bi is 0.96 V at 25*C. Calculate the solubility of Bi2S3, Assume it is an ideal solution.
Methyl salicylate, C8H8O3, the adorous constituent of oil of wintergreen, has a vapor pressure of 1.00 torr at 54.3 degrees celsius and 10.0 torr at 95.3 degrees celcius. What is it's vapor pressure at 25 degrees celcius?
A chemist wants to make 6.0L of a .350M CaCl_2 solution. What mass of CaCl_2 should the chemist use?
if 2.29 moles of argon gas are added to 3.5L of a 6.58 mole sample of argon gas what is the final volume
you have 505ml of a .170m HCL solution and you want to dilute it to exactly .100M. how much water should you add?
The solubility of barium carbonate,BaCO3, is .0100 g/L . Its molar mass is 197.6 . What is the Ksp of barium carbonate?
How many grams of acetylene are produced by adding water to 5.0 grams CaC2
The rate constant of a reaction is 4.7 10-3 s-1 at 17°C and the activation energy is 33.6 kJ/mol. What is the value of k at 75°C.
4 Fe(s) + 3 O2(g) → 2 Fe2O3(s). If 12.5 g of iron(III) oxide (rust) are produced from 8.74 g of iron, how much oxygen gas is needed for this reaction?
If I add 1.65 L of water to 112 grams of sodium acetate...What is the molality of NaC2H3O2 in this solution?
Calculate the net charge of Aspartic Acid. Its given that Aspartic acid has a pK1 COOH at 1.99 and also a pK2 NH3 group at 9.90. PKr Side Chain is 3.90 (COOH) How do i find the net charge?
Solving this question helps the student to understand what is happening in a chemical reaction and to balance the given equation.
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