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Ozone (O3) in the atmosphere can be converted to oxygen gas by reaction with nitric oxide (NO). Nitrogen dioxide is as well produced in the reaction. What is the enthalpy change when 8.50L of ozone at a pressure of 1.00atm and 25°C reacts with 12.00 L of nitric oxide at the same initial pressure as well as temperature? [H°f(NO) = 90.4 kJ/mol; H°f(NO2) = 33.85 kJ/mol; H°f(O3) = 142.2 kJ/mol]
The structure of olivine [M2SiO4(whare M=Mg,Fe)] can be viewed as a ccp arrangment of oxide ions with Si(IV) in tetrahedral goles and the metal ions in octahedral holes
If the end of the crutch is a circle of radius 1.2 cm without the tip, and the tip is a circle of radius 2.3 cm, by what factor does the tip reduce the pressure exerted by the crutch?
Explain what is the concentration of a 250.0mL solution that contains 25.0 g of Copper (II) Chloride
what is the temperature of a gas if 5.0 moles of the gas occupy a 10 liter container at a pressure of 2.5 atm?
Lakes that have been acidified by acid rain can be neutralized by liming, the addition of limestone (CaCO3). How much limestone in kilograms is required to completely neutralize a 3.8 x 109 L lake with a pH of 5.5
One sample had a mass of 25 grams. The other had a mass of 50 grams. Would the same number of particles be ejected from each sample in the first hour?
What is the equilibrium concentration of H+ in the following reaction, assuming that you start with a 1.00 M solution of acetic acid (CH3COOH).
The solubility of pure nitrogen in water at 1 atm and 25 degress Celsius is 6.8E-4 M. Calculate the concentration of nitrogen in water under atmospheric conditions where the partial pressure of nitrogen is 0.78 atm.
If a solution is made from 100 g of pentane and 100 g of hexane, what will be the mole fraction of pentane in the gas phase over that solution (if only hexane and pentane vapor are present)? Assume no deviation from Raoult's law
what is the ph of a 0.15m solution of hcooh formic acid if the ka of formic acid hcooh is 1.8x10-4 at 25 degrees
"disappeared" from a rock face that is adjacent to a lake (original pH=6.7) with dimensions 100 m x 40 m x 10 m. You think that the "disappearance" is due to leaching of the pyrite into the lake. To prove your point, what would the new pH of the l..
How many resonance structures are there for the cyclohepatrienyl cation? Draw them. Are carbon-carbon bonds equivalent?
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