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You determine that the freezing point of a solution consisting of 20.0 g of cyclohexane and an unknown amount of naphthalene has a freezing point depression of 3.30 degrees C. How much naphthalene was added to the cyclohexane? Give your answer in grams to three significant figures.  Kfp = -20.4 deg/molal for cyclohexane.
A buffer solution with a pH reading of 8.50 was prepared by mixing 0.25 mole acid (HA) and 0.05 mole NaOH in 500.0mL DI water... how much more grams of NaOH
What is the gauge pressure at a depth of 4.50 mi below the surface of the sea if thewater temperature averages 60°F? Give your answer in lb (force) per sq. in. The sp grof sea water at 60°F/60°F is 1.042 and is assumed to be independent of pressur..
An attempt at synthesizing a certain optically active compound resulted in a mixture of its enantiomers. The mixture had an observed specific rotation of +12.1 degree.
The resulting solution is then titrated with 0.1041 M sodium hydroxide, and 12.39 mL of the sodium hydroxide solution are needed to reach a phenolphthalein end point.
a reaction mixture initially contains a br2 partial pressure of 755 torr and a cl2 partial pressure of 725 torr at 150
what will be the final temperature of the system when thermal equilibrium is attained
Find the mass of carbon in 1.750 L of acetic acid (CH3COOH) given the density of acetic acid is is 1.050g/mL.
if a 1500 rm kg car can accelerate from 30 kmh to 50 kmh in 3.1 s how long will it take to accelerate from 50 kmh to 75
Using the procedure in the lab manual for the synthesis of aspirin (MM = 180.154 g/mol), you recover 1.34 of aspirin. Calculate your percent yield of aspirin.
2C2H6 + 7O2---> 4CO2 + 6H2O if the reaction produces 2.75 mol of H2O how many grams of CO2 are also produced?
For some enzyme reactions (for example, the hydrolysis of cAMP by phosphodiesterase in vertebrate retinal cones)the enzyme is present in large quantities,so that e0/s0 is not a small number.Fortunately,there is an alternate derivation of the Micha..
What volume (mL) of hydrogen gas, saturated with water vapor, will be obtained from a 0.1138 gram sample of alloy which is 73.2% aluminum? (Pbar= 754.3 torr, Temp= 21.2 Celsius)
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