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The charcoal from ashes found in a cave gave 3.34 14C counts per gram per minute. wood from the outer portion of a growing tree gives a comparable count of 16.0. The half life of 14C is 5700 years.
A gas is orignally contained within a container of volume 100m^3 and is held at a pressure of 1 atmosphere and temperature of 15C, How many moles of gas were orignally contained
What challenges face the people of South Asia with regard to the monsoon, and how have they adapted themselves and their landscapes over thousands of years?
How do the Himalayan mountain and monsoon season help define the character of South Asia?
The standard free energy of formation of nitric oxide, NO at 1000K is 78kJ/mol, calculate the equilibrium constant for this reaction at 1000K, N2(g) + O2(g) <--> 2NO(g)
shallow glass dish whose width w is 4.40 cm. When an observer's eye is placed as shown, the observer sees the edge of the bottom of the empty dish, Find the height h of the dish
In the "Returning Soldiers" document on p. 735, Dubois lists four grievances regading the treatment of African-Americans by the United States:
Analyze how the rhetoric of World War II brought the contradiction between the principle of equal freedom and the actual status of blacks to the forefront of national life
For the equilibrium reaction 3C(s) + 4H2(g) <--> C3H8(g), delta S = -269 J/mol*K delta H=103.8kJ/mol, calculate the equilibrium constant at 25 degrees celsius for the reaction
How did the New Deal alter the role of the national government? In your answer discuss specific New Deal reforms
if 1 mol of liqid CCl4 at 25 degrees C has an entropy of 216J/K, what is the entropy of 1 mol of CCl4 vapor in equilibrium with a liquid at this temperature
Examine the restrictions placed on freedom during World War I . Be sure to analyze Debs's piece in "VOices of freedom", the Committe on Public Information , and "coercive patriotism.
A charge +3.9 ?C is placed at the center of the hollow spherical conductor with the inner radius 3.1 cm and outer radius 5.5 cm, What is the total charge on interior and exterior surface
Identify and analyze the main events of the Korean War and Cuban Missile Crisis.
What is the pH of a solution that results when 0.010 mol of HNO3 is added to 500mL of a solution that is 0.10M in aqueous ammonia and 0.20M in ammonium nitrate. Assume no volume change and the Kb fo
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of +7q, What is the ratio of the final charge on sphere C to q, What is the ratio of the final total charge on the three
What did some reform-minded Catholics in Nicaragua hope the pope might do during his visit to that country? What position did the pope eventually make clear to the Nicaraguan priests? Why were some Ni
What volumes of 0.50M HNO2 (Ka = 4.00*10^-4) and 0.50M KNO2 is needed to make a 1L buffered solution with a pH of 3.00
An incoming 40 keV photon interacts with an atom by the Compton scattering process, what is the energy of the scattered photon
Identify major trends in human history since the 1500's, do you think these pase events can shead light on the future of our world?
for ammonia, Kb is 1.8*10^-5, to make a buffered solution with pH of 10.0, the ratio of [NH4+] to [NH3] must be
When an object is placed 15 cm in front of a thin lens, a virtual image is formed 5.0 cm away from the lens, Calculate the location of the final image
a batch of 1000 kg of KCl is dissolved in sufficient water to make a saturated solution at 363K, where the solubility is 35 wt% KCl in water. the solution is cooled to 293K, at which the solubility
Discuss the two factors to which, according to the text, we can attribute the rise of the stream of consciousness novel in the 20th century.
Calculate the atom economy for each method for preparing 2,3-dibromo-3-phenylpropanioc acid.