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When light of frequency 2.32×1015 s-1 shines on the surface of a metal, electrons are ejected with a maximum kinetic energy of 3.40×10-19 J. Calculate the wavelength of this light.
A 680 MW coal fired power plant is 34% efficient at producing electricity. The coal has a heating value of 20,000 kJ/kg, an ash content of 5.5% and a sulfur content of 4.5%. Note: 1 MW = 1000 kW , and 1 kW = 1 kJ/s. a. What is the daily input rate..
Calculate the molar mass of the unknown gas. (remember that the faster the rate of effusion, the shorter the time required for effusion of 1.0L
Octane has a density of 0.692 g/mL at 20 C. How many grams of O_2 are required to burn 1.50 gal of C_8H_18?
Recent research on the solubility of Greenockite, a thermodynamically stable form of cadmium sulfide (CdS), reveals that mildly acidic solutions with sulfide concentrations between 10-4 and 10-3 M can effectively minimize the solubility of CdS
What is the density of a block of marble that occupies 251cm^3 and has a mass of 623g?" answer in units g/cm^3
MnO2 is oxidized to MnO4 and Cu2 is reduced to Cu . Complete and balance the equation for this reaction in acidic solution. Phases are optional.
explain Why this separation occur and which solvent will be on top - the temperature of twenty degree Celsius. When hexane is added with H 2 O, there is a separation
The enthalpy of vaporization of water at 373 K and 1 bar is 40.7 kJ/mol and the molar heat capacities are 75.3 J/(mol K) for liquid and 33.6 J/(mol K) for gaseous water. Find the enthalpy of vaporization of water at 273 K and 1 bar.
After equilibration GC analysis of octanol phase shows component concentration of 0.4 M. What is the partitioning coefficient of this component? (Octanol/water partitioning coefficient expressed as K = Coct/ Cwater)
The precipitate, after having been filtered and air-dried, has a mass of .284 g. The limiting reactant in the salt mixture was later determined to be CaCl2x2H2O.
An aerosol spray can of deodorant with a volume of 210mL contains 3.4g of propane gas as propellant. Part A What is the pressure in the can at 20 celsius
monoprotic acid, has a pH=2.00. What is the value of the ionization constant, Ka for this acid?
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