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Question: What is the radius of an aluminum nucleus? Is your answer consistent with the observation that Rutherford's theory does not hold for a head-on closest approach of 5.5fm?
Methane gas (CH4) comprises 7 x 10-5 % by mass of the Earth's atmosphere. What is the residence time of the gas in the atmosphere if it is being lost to the methane sinks at the rate of 4 x 1011 kg yr-1.
A gaseous mixture of O2 and Kr has a density of 1.180 g/L at 355 torr and 300. K. What is the mole percent O2 in the mixture?
A solution of 48.6% H2SO4 by mass has a density of 1.39 g/cm3 at 293 K. A 23.2 cm3 sample of this solution is mixed with enough water to increase the volume of the solution to 99.8 cm3. Find the molarity of sulfuric acid in the obtained solution.
Calculate the percent ionization of 0.085 moles/l of lactic acid in a solution containing 0.050 moles/l sodium lactate
dropped into flask containing dilute H2SO4 at a pressure P = 1.00bar, and temperature T= 325K. What is the reaction that occurs?
Formulate a rule/guideline for determining the number of valence electrons from an electron configuration in elements with d electrons present
What is the molarity of a 15.5 m (m stands for molality) solution of HCl if the density of the solution is 1.33 g/cm^3.
A gas sample has a volume of 4.50 L when the temperature is 28 oC and the pressure is 1.00 atm. What will be the new volume of the gas when the temperature is changed to 0.0 oC and the pressure to 850 torr
If you are told that the entropy of a certain system is zero, what do you know about the system and the temperature? The energy of a gas is increased by heating it. Using CO2 as an example, illustrate the different ways in which additional energy ca..
hydrazoic acid (HN3, Ka = 1.900x10-5) with 0.08699 M KOH, what is the pH after 92.88 mLs of titrant have been added
The rate constants of some reactions double with every 10 degree rise in temperature. Assume that a reaction takes place at 295 K and 305 K. What must the activation energy be for the rate constant to double as described
What is the molality of a salt solution prepared by dissolving two moles of salt in 500 grams of water?
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