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Use Planck"s constant (h = 6.6260755 x 10-34 J-s) to determine the Energy or frequency for electromagnetic waves: E = h. Describe the photoelectric effect. Calculate the wavelength and/or frequency of the photon of light needed to cause an electron to be emitted from a material. Compare and contrast continuous spectrum and line spectrum as they relate to the elements. Describe how spectral lines can be used to identify elements.
Calculate the value of q, w, delta E , for the reversible isothermal expansion at 300k of 2.00 mol of a perfect gas
A balloon filled with helium has a volume of 2.41 L on a warm day at 311 K. It is brought into an air-conditioned room where the temperature is 295 K. What is its new volume.
Determine which enantiomer of 2-iodo-3-phenylbutene gives the E product (2R, 3R or 2S, 3R), and explain clearly (using unambiguous diagrams) why that is the case.
A 0.150-mole quantity of CoCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Co2 ions at equilibrium? Assume the formation constant of Co(NH3)62 is 5.0× 1031.
The mass of a cube of iron is 379 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
If the CO2 and O2 in the above reaction are measured at the same temperature and pressure, 1. How many milliliters of O2 are produced per minute. At what rate is the Na2O2 consumed, in grams per hour
Acetic acid when pure, has a freezing point of 16.0 Celsius; Liquid acetic acid has a heat capacity of 1.96J/g*C. A 25.0 g piece of solid acetic acid at 16.0C is placed into an insulated container containing 50.0g of liquid acetic acid at 50.0C
determine what is the percent by mass of sodium phosphate in a 0.142m na3po4aq solution? if it is given that it has a
Prepare (2R,3S)-2,3-dibromobutane (a meso compound) starting from a racemic mixture of (2S,3S)- and (2R,3R)-2,3-dibromobutane
While cytotoxicity, antiviral activity, and immunosuppressant properties of didemnin-C and of its 8 analogs were excellent to very good, these compounds were, unfortunately, dropped from further studies and development at the stage of human trials..
The normal respiratory rate for a human being is 15.0 breaths per minute. The average volume of air for each breath is 0.505 L at 20.0°C and 9.95 x 104 Pa. What is the volume of air at STP that an individual breathes in one day (in cubic meters or..
How many liters of CO2 will be produced with the complete combustion of of methane (CH4) with 4.3L of oxygen?
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