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Under particular conditions, it takes one mole of chlorine gas 32 seconds to effuse through a porous membrane. Under identical conditions, it takes two moles of an unknown gas 47 seconds to effuse through the same porous membrane. Explain what is the molar mass of the unknown gas?
The temperature of the calorimeter plus contents increased from 21.36 *C to 26.37 *C.
Are necessary to completely neutralize a solution in which 60.0g of NaOH have been dissolved
volume of 20.0 mL of a 0.190 M HNO3 solution is titrated with 0.550 M KOH. Calculate the volume of KOH required to reach the equivalence point.
What volume will 500 mL of gas at 20°C and a pressure of 420 mm Hg occupy if the temperature is reduced to -80°C and the pressure is increased to 650 mm Hg?
A protein has a net charge of +2 in an electric field at pH 4.5. What is the frictional drag experienced by the protein if it moves at a velocity of 0.0018 m/sec and the electric field strength is 10 J/C·m. Units for frictional drag should be in k..
a sample of helium gas initially at 37 degrees celsius, 785 torr and 2.00L was heated to 58.0 degrees celcius while the volume expanded to 3.24L. What is the final pressure in atm.
Which of the following is the most feasible reagent for oxidizing silver(i) to silver(ii): diflourine, flouride ion, diiodide, iodide ion?
When a voltage of 30 V is applied to the heater for 3.0 min, a constant current of 2.5 A is observed. The calorimeter temperature increases from 20.00C to 25.59C. Calculate C_bomb for the calorimeter. Assume 2000.0 g of water in the bucket.
Determine the molecular formula of the oxide of phosphorous when it is in its gaseous state.
Palladium crystallizes in a face-centered cubic unit cell. Its density is 12.0 g/cm^3 at 27 degrees C. Calculate the atomic radius of Pd.
6 M NH3, a basic solution, can't be found on the reagent she lf however 6 M NaOH, also a base, is available. Explain what would be observed if the 6 M NaOH is substituted for the 6 M NH3 in testing the reference solution
What is the molality of a 25.5% aqueous solution of phosphoric acid, H3PO4 (M = 97.99 g/mol)
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