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(a) A red laser pointer emits light with a wavelength of 650 nm. What is the energy (in J) of a photon of light of this wavelength?
(b) Knowing that 1eV = 1.602 x 10^-19 J, calculate the energy of the photon in eV.
(c) If a different photon has \(\lambda = 410nm \) calculate its energy in J and eV.
Halogenated compounds are particularly easy to identify by their mass spectra because chlorine and bromine occur naturally as mixtures of two abundant isotopes
.914g sample of stannous flouride gives a 1,078g precipitate of stannous phosphate. calculate the theoretcial yeild?
what it is perscribed for 3.Mechanism of action( for example: how it binds to biological molecules, how it may inhibit enzyme activity.)
A laser pulse with wavelength 555nm contains 4.40mJ of energy. How many photons are in the laser pulse.
The relationship (if any) of the lattice energy of compounds such as ZnO vs. H3BO3 vs. their respective solubilities. For instance, at neutral pH and standard conditions
The solubility of NaCl in water at 25 degrees Celsius is 38 g NaCl in 100 grams of water. A mixture was made using 33 g of NaCl and 100 g of waer at 25 degrees Celsius. Which term best describes the mixture?
What mass of sucrose should be combined with 467 g of water to make a solution with an osmotic pressure of 8.30 atm at 300 K? (Assume the density of the solution to be equal to the density of the solvent.)
If the pressure increases to 800. torr, how many moles of gas were added to the container? Assume a constant-volume container.
MgNH4PO4.6H2O loses H2O stepwise as it is heated. Between 40c and 60 the monohydrate is formed, and above 100 celcius the anhydrous material is formed.What are the phosphorus percentage of the monohydrate and of the anhydrate material?
completely evacuated and then filled with an unknown gas to a pressure of 747 mmHg at 22 degree C. If the glass bulb gained 0.103 g in mass, what is the molar mass of the gas?
If you take a 67.5 mL portion of 1.98 M. NH3 stock solution and dilute it to a total volume of 0.600 L, what will the concentration of the final solution be?
If the titrant has a molarity of 0.2500 M and there are 45.00 mL of analyte present, what is the molarity of the analyte?
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