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Escaping Electrons
The first ionization potential of potassium is 419 kJ/mol. If UV-?radiation with wavelength ? = 250 nm is used to eject electrons from potassium, the energy of each photon in excess of the ionization potential provides kinetic energy to escaping electrons. The mass of an electron is 9.109 x 10-?31 kg. What will be the velocity of the escaping electrons under these conditions? What is the de Broglie wavelength of the escaping electrons?
The determination of iron in industrial waste stream is often carried out by reacting the water sample with o-phenanthroline to form a red-orange complex that absorbs at 510 nm.
"The chains of several cell membrane - bound proteins are known to wind back and forth through the cell membrane, such that some parts of the protein structure are extracellular, some parts are intracellular, and some parts lie within the cell mem..
110 mL of H_2O is initially at room temperature (22.0 degrees C). A chilled steel rod at 2.0 degrees C is placed in the water. If the final temperature of the system is 21.0 degrees C.
The volume of a 24.0g sample of methane gas is 22.8L at 40.0*C and 4.00atm. What will it's volume be at 68.0*C and 4.00atm.
calculate how many moles of KIO3 are needed to make 50 ml of 0.20 M solution?
Important information about Heat of Reaction, The combustion of butane produces heat according to the equation 2C4H10(g) + 13O2(g) --> 8CO2(g) + 10H2O(l) deltaHrxn= -5314kJ
Compute the final temperature of the mixture (assuming no heat loss to the surroundings). The heat capacities of H2O(s) and H2O (l) are 2.08 and 4.18 J/g · °C, respectively, enthalpy of fusion for ice = 6.02 kJ/mol.
If a 2.1 L reaction vessel initially contains 725 torr of cyclopropane at 485 degrees C , how long will it take for the partial pressure of cylclopropane to drop to below 102 torr .
given that the molar enthalpy of vaporization delta h for H2O(l) is 44kj at 298k, what is the standerd enthalpy change for the reaction 2H20(G)+ O2(g)---->2H2O(G)?
Heat realsed by combustion of ethyl ether, 1. In earlier times, ethyl ether was commonly used as an anesthetic. It is, however, highly flammable. When 5.0 mL of ethyl ether C4H10 (l), (d=0.714 g/mL) is burned in a bomb calorimeter
compute the partition coefficient for the compound between C 6 H 14 and H 2 O (Kphexane/water).
What are the molality and mole fraction of solute in a 34.0 percent by mass aqueous solution of formic acid (CH3OH)?
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