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Maple syrup is habitually a solution of sucrose in water. Compute the molality of the syrup if a sample freezes at -.50 degrees Celsius, presuming the solute is pure sucrose. (Kf = 1.86 degrees Celsius/m)
Which equation represents a reaction that provides the heat of formation of Fe3O4?
What is the pressure in a 65.0L cylinder filled with 0.235 moles of nitrogen gas at a temperature of 105K.
the concentration of carbon monoxide in an urban apartment is48 mugm3. what mass of carbon monoxide in grams is present
It takes 45.0J to raise the temperature of an 9.80g piece of unknown metal from 13.0C to 24.0 C. What is the specific heat for the metal
What mass of barium is produced when molten barium chloride is electrolyzed by a current of 2.50 x 10^5 A for 6.00 hours
if 76g of Cr2O3 and 27 g of al completely react to form 51 g of Al2O3 how many grams of Cr are formed?
A buffer solution is prepared by dissolving 1.50g each of benzioc acid C6H5CO2H and sodium benzoate NaC6H5CO2 in 150.0mL of solution.
What is the mass in grams of this precipitate. What is the concentration of the Cl- ions in the final solution
the density of carbon in the form of diamonds is 3.51 gcm3. if you have a 40-carat spherical diamond what is the
A sample of steam with a mass of 0.552 g and at a temperature of 100 C condenses into an insulated container holding 4.35 g of water at 7.0 C. Assuming that no heat is lost to the surroundings, what will be the final temperature of the mixture
To qualify to run in the 2005 Boston Marathon, a distance of 26.2 miles, an 18 year old woman had to have competed another marathon in 3 hours and 40 minutes or less. To qualify, what must a woman's average speed have been
What was the percentage by mass of Mg(OH)2 in the original sample? [Hint: When Mg(OH)2 or Al(OH)3 reacts with HCl(aq), the products are a chloride salt, water and CO2(g). Assume that all of the CO2(g) leaves the solution without reacting.]
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