What is the concentration of in mass percent
An aqueous solution has a vapor pressure of 84.0 at 50 . The vapor pressure of pure water at this temperature is 92.6 . What is the concentration of in mass percent?
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How many liters of h2 gas at stp can be produced by the reaction of 4.60g of Na and excess water, accoring to the following equation?2Na(s) + 2H2O(l) ---> H2(g)+2NaOH(aq)
Calculate the moles of aluminum ions present in 250.0 g aluminum oxide. Acetaminophen, a common aspirin substitute, has the formula C8H9NO2.
The total pressure in the system at equilibrium is 3.0 atm. A separate measurement shows that the mole fraction of O2 at equilibrium is 0.12. (a) Write the Kp expression for this reaction.
Water's relatively high specific heat (4.184 J/g°C) makes it an ideal coolant for automobile engines. How much heat from an engine would be absorbed if 13.9 kg of cooling system water were heated from 25°C to 75°C?
A 0.21L sample of hydrogen gas is collected over water. The reaction that allowed the gas to be liberated was between Mg ribbon and 3M HCl. If the starting conditions were at STP with 0.58g of Mg and 10 mL of the HCl.
A high-boiling, bp = 202-204 degrees C, burns with a yellow, sooty flame. Sodium fusion indicated that halogens, nitrogen and sulfur are not present. It is not soluble in water, dilute sodium bicarbonate solution, or dilute hydrochloric acid.
A balloon is filled with helium to a volume of 25 L at 100kPa pressure and 25°C. The balloon is then released. What volume does it occupy when it has reached an altitude where the pressure is 18 kPa and the temperature -24°C?
An ideal gas is contained in a cylinder with a volume of 5.0 102 mL at a temperature of 30°C and a pressure of 720. torr. The gas is then compressed to a volume of 25 mL, and the temperature is raised to 794.°C.
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Write a letter to the editor on land pollution that threatens the health of individuals living in Guyana, and clearly define the problem.
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