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A gas sample is connected to a closed end manometer. the difference in mercury levels in the two arms is 115mm. what is the gas pressure in torr if the atmospheric pressure is 750 torr?
A buffer is prepared by mising 204mL of 0.452M HCl and 0.500l of 0.400M sodium acetate Ka=1.8x10^-5 a) what is the pH, b) how many grams of KOH must be added to 0.500l of buffer to change the PH by 0.15units
What are he experimental conditions of T and P that will be used to calculate the mass of air in the flask? B) Calculate the density of air at the experimental conditons identified in part A
10.00mL aliquots of an unknown containing element X was mixed with aliquots of a standard solution of element X for atomic absorption. The standard solution contained 1786.50ug X/mL.
The following processes is a likely change in a redox reaction. Label the chemical change as an oxidation process, a reduction process, or neither
A roller coaster car of mass 310 kg (including passengers) travels around a horizontal curve of radius 33 m. Its speed is 16 m/s. What is the magnitude and direction of the total force exerted on the car by the track
A "little more" than 5 mL of a saturated solution of borax is transferred to the corresponding calibrated test tube and subsequently titrated with the standardized hydrochloric acid solution.
If 101 g of CaO and 261 g of NH4Cl are mixed, what is the maximum possible yield of NH3?What mass of the excess reactant remains after the maximum amount of ammonia has been formed?
What can you say about the realtive magnitudes of the latice energy of lithium iodide and its heat of hydration?
calculate the mass of magnesium that is required to produce 35.8ml of hydrogen gas at 28°c and a barometric pressure of 745 mmHg when collected over water?
What is the chlorine flow rate at the reactor pressure and temperature. If the etching rate of silicon is 0.50min, and the wafer is 300 mm in diameter, how many moles of silicon are etched per hour
Calculate the dilution factor for all 7 test test tubes. Show all work/calculations. 0.1 ml of the solution from the serial dilution 10^-4, 10^-5 and 10^-6 was pipetted onto three separate agar plates.
A constant current is passed through a solution containing Cu2+(aq) resulting in the deposition of 4.40 g of Cu at the cathode. Assuming a current efficiency of 100%, if this same current is passed through a solution of TcO4 for the same amount of..
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