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what is the concentration of oxygen in air-saturated water at 25 degrees C and .85 atm? Assume that the mole fraction XO2 is .209 and Henry's law constant for oxygen at 25 degrees C is 1.28*10^-3M^-1atm^-1
What mass in kg of NH3 must be used to produce 1.8 106 kg HNO3 by the Ostwald process, assuming 100% yield in each reaction?
A hypothetical molecule, X-Y, has a dipole moment of 1.90 D and a bond length of 169 pm. Calculate the percent ionic character of this molecule.
35.5 grams of an unknown substance is heated to 103.0 degrees Celsius and then placed into a calorimeter containing 100.0 grams of water at 24.0 degrees Celsius.
How many milliliters of 5.00 M HCl solution are needed to provide the 1.50 moles of HCl needed for a reaction?
calculate the solubility (in mol/liter) of Al(OH)3 in a solution
how many mols of o2 are produced by the reaction of 156g of co2 with an excess of ko2
Consider 48.5 mL of a solution of weak acid HA (Ka = 1.00 * 10-6), which has a pH of 4.350. What volume of water must be added to make the pH = 6.000?
The minerals chalcocite (Cu2S) and malachite (Cu2CO3(OH)2) are two primary sources of copper. What is the oxidation state of copper in each of these minerals?
Estimate the ratios of the basic and acidic forms of the histidine side chain
When 79.272 cg of nitrogen gas is reacted with 79.272 cg of hydrogen gas, how many grams of ammonia are formed?
Calculate the freezing point of a mixture that contains 4.68 g of diphenylamine (molecular weight 169.2 g/mol) dissolved in 46.64 g of cyclohexanol.
The electron in the n = 5 level of a hydrogen atom emits a photon with a wavelength of 1280 nm. To what energy level does the electron move?
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