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Suppose a student creates a solution by dissolving 0.5006 g of a non-dissociating, non-volatile unknown solute in 15.90 g cyclohexane. The freezing point change is ?1.9°C.a) Calculate the number of moles of solute in the solution. (b) Calculate the molar mass of the solute.
Calculate the volume of 0.50M NaOH needed to exceed saturation by 10% the volume from question 4 of 0.50M Mn(NO3)2 with Mn(OH)2.
the neutralization of HCL with NaOH at 25 degrees celsius is -79.9 kj/mol. Calculate the equilibrium constant for the reaction.
During a work-up, we are asked to interrupt vacuum, "drizzle" cold methanol over the crude product, then reestablish vacuum. What is the purpose of this step and why does the methanol need to be cold
a)the air from a large building at 68C. b) the air froma small house at 68C. c)the air from a small room temperature at 71C
The rate constant for the production of glucose from cellulose with a newly developed catalyst was found to vary with temperature as shown by the data in teh following table. What is the activation energy for this reaction
This mixture has density of 1.391g/L and occupies a volume four times as that of pure hydrocarbon. Determine the molecular formula of the hydrocarbon.
6.00 mL of this solution was mixed with 77.00 mL of a solution of potassium nitrate and 68.70 mL of a solution of ammonium chloride. What is the molarity of Nacl in the final solution?
Compute the amount of work done by the gas if all three weights were removed simultaneously during an isothermal expansion
Given the values of Ka and Kb below, which of the systems given would be most suitable to use to construct a buffer of pH 9 and WHY
how many grams of metallic copper can be obtained when 54.0 grams of Aluminum react wit 319 grams of CuSO4?
A sample of neon gas used in a neon sign occupies a volume of 1.70 L at a pressure of 580 torr. Calculate the volume of the gas if the pressure in the glass tube of the sign is 781 torr.
If the reaction of 0.650 g of rhodium(III) sulfate with excess sodium hydroxide produces 0.320 g of rhodium(III) hydroxide, what is the percent yield
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