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The ionization potential for a certain atom is 350Kj/mol. If the electron is in the first excited state, the ionization potential is 105 kj/mol. If the atom undergoes deexcitation, what would be th
A 3.00-mol sample of oxygen gas is confined to a 4.95-L vessel at a pressure of 8.06 atm. Find the average translational kinetic energy of the oxygen molecules under these conditions.
How many liters of hydrogen gas are collected over water at 18 degrees Celsius and 725 mmHg when 0.84g of lithium reacts with water? Aqueous lithium hydroxide also forms.
A cylinder contains a mixture of helium and argon gas in equilibrium at 170°C. (a) What is the average kinetic energy for each type of gas molecule?
Calculate the heat produced by combustion per liter of methanol. Methanol has a density of 0.791 g/ml. Calculate the mass of CO2 produced per kj of heat emitted.
Starting 2 seconds after the speeder passes, the police car accelerates at 6.0m/s^2 for 6 seconds, and then maintains constant speed until it catches the speeding car. (a) How many seconds after the
Explain the relative reactivities for butly chloride, sec-butyl chloride, and tert-butyl chloride with NaI acetone in terms of the structure of the transition state.
A gaseous mixture of O2 and N2 contains 30.8 percent nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 565 mm Hg?
A BMW of mass 2.6 103 kg is traveling at 42 m/s. It approaches a 1.1 x 103 kg Volkswagen going 24 m/s in the same direction and strikes it in the rear. Neither driver applies the brakes. Neglect the
A person pushes a 16.0-kg shopping cart at a constant velocity for a distance of 16.0 m. She pushes in a direction 20.0° below the horizontal. A 32.0-N frictional force opposes the motion of th
a) If they move at constant velocity, what is the frictional force between A and B? b) What is the maximum horizontal force that can be applied to B without A slipping?
A 0.1569-g sample of solid magnesium is burned in a bomb calorimeter that has a heat capacity of 1769 J/° C. The calorimeter contains exactly 251 g of water, and the temperature increases by 1.1
You have a 25kD histidine tagged bacterial protein (100% pure). You apply this pure protein to a Ni+2 agarose column. Then you apply a crude mouse cell extract to the column.
Two 50 g ice cubes are dropped into 200 g of water in a glass. If the water was initially at a temperature of 25oC and if the ice came directly from a freezer operating at a temperature of -15oC, wh
If a storm window is installed having the same thickness of glass but with an air gap of 7.5 cm between the panes, what will be the corresponding rate of heat loss?
The temperature of a household refrigerator is maintained at 0C and the temperature of the room at 25C. The heat leaking into the refrigerator from the warm room is 8*10^6 J every 24 hours, enough t
Suppose that he uses 1/2 liter of tap water at 59o C, and that the water falls 40 cm each shake, and the chef making 30 shakes each minute. Neglecting any heat loss to the room, how long must he sha
Water flows through a horizomtal tube of length 25cm and internal diameter 1 mm under a constant head of the liquid 15cm high. If a volume of 72,5 cm3 of water issues from the tube in 10 minutes, C
Two samples an aqueous solution show no precipitate when AgNO3 or BaCl2 is added. what anions are shown to be conclusively presnt in the unknown solution?
After the collision, the pendulum and object stick together and swing to a maximum angular displacement, theta. (a) Find the initial velocity of the pendulum. (b) Find the maximal angle, theta
How much limestone in kilograms would be required to completely neutralize a 6.2x10^9 L lake containing 6.5x10^-3 g of H2SO4 per liter?
A nickel compound NiL2(where L is a halide) has a molar absorptivity of 1250(mol/L)^-1cm^- at 425nm (max) when a 50.00mL solution containing 0.00109g of this compound was analyzed using the same pro
If the fluoride is consumed as sodium fluoride (45.24% ), what amount of sodium fluoride contains the recommended amount of fluoride?
Ethanol has a vapor pressure of 7.9 x 103 Pa at 25ºC. Determine the free energy difference between ethanol in the liquid state at 25ºC and ethanol vapor at 1 bar pressure at 25ºC.
how fast can you drive on a horizontal roadway around a right turn of radius 30.0 m before the cup starts to slide? If you go too fast, in what direction will the cup slide relative to the dashboard