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A 1.375g sample of mannitol. a sugar found in seaweed. is burned completely in oxygen to give 1.993 g of carbon dioxide and 0.9519 g of water. Find the empirical formula of mannitol?
Calculate the molarity (M) of the following solutions. Express the answer using 2 sig figures.
An automobile tire at 32.0 psi at 25.0 Celsius is driven on a trip. At the end of the trip the pressure is 35.0 psi. What is the temperature of the tire in degrees Celsius
How many grams of urea [(NH2)2CO] must be added to 345 g of water to give a solution with vapor pressure 2.45mmHg less than that of pure water at 30 degrees Celsius?
the reaction of fluorine of 7.6 gramsnbsp with excess chlorinecl produced 3.3 grams of clf3. determine the percent
Nitrogen and hydrogen combine to form ammonia in the Haber process. Calculate (in kJ) the standard enthalpy change ?Hº for the reaction written below, using the bond energies given.
A biochemical engineer isolates a bacterial gene fragment and dissolves a 14.0 mg sample of the material in enough water to make 34.5 mL of solution. The osmotic pressure of the solution is 0.340 torr at 25°C.
Formic acid, HFor, has a Ka value equal to about 1.8 X 10^-4. A student is asked to prepare a buffer having a pH of 3.40 from a 0.10 M HFor and a 0.10 M NaFor solution. How many milliliters of the NaFor solution should she add to 20 mL of the 0.10..
At 5096 oC the equilibrium constant for the reaction: 2 NO(g) N2(g) + O2(g) is KP = 2.93. If the initial pressure of NO is 0.00735 atm, what are the equilibrium partial pressures of NO, N2, and O2
Malonic acid titrated with NaOH.,what indicator could be used to find the endpoint,If there is more than once choice, which is best
A 0.48 mg sample of sulfur-35 has an activity of 20.4 Ci. What is the decay constant of sulfur-35 (in /s)
How many grams of chromium would be electroplated by passing a constant current of 5.2 amperes through a solution containing chromium(III) sulfate for 45.0 minutes?
Which reaction of these potential acids and bases does not occur to any appreciable degree due to an unfavorable equilibrium
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