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If carbon dioxide gas is collected over water at 25C and 775 torr, what is the partial pressure of the CO2? The vapor pressure of water is 23.8 torr at 25C.
In a calorimeter, 100 g of ice melts at 0oC. The enthalpy of fusion of the ice is 334 J/g. How much heat was absorbed.
a buffer is prepared by mixing .200 mole of formic acid with .300 mole of sodium formate in a volume of 200 ml what is the initial ph.
A piston has an external pressure of 14.0 torr. How much work has been done if the cylinder goes from a volume of 0.130 liters to 0.530 liters.
A sample of water is collected over water at a total pressure of 616.8 mmHg at 300 C. The vapor pressure of water at 300 C is 31.8 mmHg.
Histidine has three ionisable functional groups. Write the equilibrium equations for its three ionizations and assign the proper pKa for each ionization.
How many seconds are required to produce 4.94 mg of chromium metal from an acidic solution of potassium dichromate, using a current of 0.234 A?
The atomic weight of a newly discovered el-ement is 10.600 amu. It has two naturally occuring isotopes. One has a mass of 10.000 gms and a natural abundance of 70.000%. What is the isotopic mass of the other isotope?
Gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 10.82 g of ethane is mixed with 62.90 g of oxygen.
How many grams of F2 are needed to produce 237 g of PF3 if the reaction has a 80.4% yield?
Compute the reactor volume and space time to get 90% conversion in a PFR and in a CSTR
Electrochemistry and Solubility, The potential of the cell Bi|Bi2S3(s) |Bi2S3(aq)|Bi is 0.96 V at 25*C. Calculate the solubility of Bi2S3, Assume it is an ideal solution.
A volume of 725 mL of a gas is collected at 105 degrees C and 746 torr. The gas sample weighs 1.92 grams. what is the gas.
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