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Atmospheric pressure is 1.00 atm , but air is only composed of 21.0% (by moles) oxygen. Thus, the partial pressure of oxygen in air is less than 1.00 atm. What is the millimolar concentration of dissolved oxygen for a lake or stream under the partial pressure of oxygen and a temperature of 12 degrees Celsius?
Calculate the ratio of dihydrogen phosphate to hydrogen phosphate in the blood at pH 7.4. The Ka = 6.3 x 10 -8 5. 2.
An aqueous solution that contains 329 ppm of KNO3 is being used to feed plants in a graden. What volume (in mL) of this solution is need to prepare 9 L of a solution that is 23 ppm in KNO3?
solution of water (K_f}=1.86 C/m) and glucose freezes at - 2.35 C. What is the molal concentration of glucose in this solution? Assume that the freezing point of pure water is 0.00 C.
Attractive intermolecular forces exist between the molecules in the gas. The effect of these attractive intermolecular forces in a real gas is to
Calculate deltaG for this reaction at 298K in kJ. What can be said about the spontaneity of the reaction at 298K? (1) spontaneous in the reverse direction
Aluminum reacts with oxygen to make aluminum oxide. If 5.2 moles of aluminum react, how many moles of aluminum oxide are formed. Show work.
Consider a metal atom surrounded by the cube- shaped arrangement of eight ligand atoms (Oh symmetry). 1. Derive the reducible representation for the 8 sigma-bonds.
MgNH4PO4.6H2O loses H2O stepwise as its is heated between 40 degree celcius and 60degree celcius the monohydrate is formed and above 100 degree celcius the anhydrous is formed what are the phosphorus percent of monohydrate and of the anhydrous mat..
As a scuba diver descends under water, the pressure increases. At a total air pressure of 2.96 atm and a temperature of 25.0 C, what is the solubility of \rm N_2 in a diver's blood?
how many liters of hydrogen are obtained from the reaction of 4 g calcium with excess water, at 37 Celsius and 0.962 atm?
What is the concentration of iron in the steel sample? Express your answer as grams of Fe per grams of steel (g Fe2 / g steel).
a solution made by adding .106 mol of CH3COOH to 1.0 kg of water is found to freeze at -.203 C. Calculate the percent of the acid that has undergone ionization. The molal freezing point constant of water is 1.86
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