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At 25?C the heat of fusion of aluminum is 10.6kj/mol and the heat of sublimation is 326.4 kj/mol. What is the heat of vaporization of aluminum at 25?C?
A biochemical engineer isolates a bacterial gene fragment and dissolves a 10.9 mg sample of the material in enough water to make 36.5 mL of solution. The osmotic pressure of the solution is 0.340 torr at 25°C. (a) What is the molar mass of the gen..
Decomp. of SO2Cl2 is first order and has a rate constant of 1.42x10^-4 S^-1. What is the half-life for the reaction. How long will it take to decomp 27.3% of its initial cocentration
The liquid contains 42.5 mole% benzene and the vapor contains 73.5 mole% benzene. -Calculate the heating requirement for this process in kW. -Using Raoult's law determine whether or not the given benzene analyses are consistent with each other
Identify the reaction conditions required for the dehydration of 2,3-dimethylpentan-2-ol to occur. Select all that apply.
The volume of a sample of chlorine gas is 98.6 mL at 31.4 C and 769.6 mmHg. What volume will the sample occupy at 23.2 C and 748.8 mmHg? Please show how to work out the problem if you can
Gasohol contains ethanol (C2H5OH) which when burned reacts with oxygen to produce CO2 (g) and H2O(g). How much heat is produced when 12.5 grams of ethanol burns.
A chemist must dilute 71.4mL of 296mM aqueous potassium dichromate (K2Cr6O7) solution until the concentration falls to 81.0mM . He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final ..
Describe, in as much detail as possible, the process of recrystallization as a method for purification of a solid. How does it work. What do you do
use average bond energies to calculate delta hrmrxn for the combustion of methane rmch4
The volume of a teaspoon is about 5cm, and Ben found this would cover half acre pond (2000 m2). Find the thickness of the oil film.
The binding energy of electrons to gold is 492 kJ/mol. What is the longest wavelength of light shone on gold that will cause electrons to be ejected?
determine the percent yield for the reaction between 3.74g of na and excess o2 if 5.35g of na2o2 is
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