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The vapor pressure of pure acetone (propanone) is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of the non-volatile solute in the solution?
A 33.0-g sample of an alloy at 93.0°C is placed into 258 g of water at 22.0°C in an insulated coffee cup. Assume that no heat is absorbed by the cup. If the final temperature of the system is 31.1°C
What is the expected freezing point of a solution of 110.5 g of H2SO4 in 225 g of water? Assume sulfuric acid completely dissociates in water.
bismuth oxide reacts with carbon to form bismuth metal:when 217g of Bi2O3 reacts with carbon, how many moles of Bi2O3 react?
Use a drawing program to draw a beaker.
A vitamin C capsule is analyzed by tirating with 0.3M NaOH. It is found that 24.4 ml of base is required to react with a capsule weighing 0.55g.
How many grams of methane CH4 must be combusted to heat 1.15 kg of water from 24.0 C to 93.0 C, assuming H2O as a product and 100% efficiency in heat transfer?
when ammonia is burned in oxygen, free nitrogen gas and water are produced. What volume of ammonia will react completely with 25.0 L of oxygen? what volume of nitrogen gas is formed.
during exercise a person breathes in between 100 and 200 L of air er minute. if a person is exercising enough to breathe in an average of
A coffee-cup calorimeter is calibrated by adding 1840 J of heat to the water in the calorimeter and measuring a 1.72C rise in temperature.
Empirical and Molecular Formula of Cadaverine, Cadaverine, a substance produced by the action of bacteria on meat, contains 58.55% C , 13.81% H , and 27.40% N.
Superman flies past you at a speed of 1000 miles/hr. At the moment he passes you, you throw a rock at him at a velocity of 750 meters per second
find the percent composition of a compound that contains 1.94g of C, 0.48-g of H and 2.58-g of S in a 5.00-g S sample of the compound
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