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If the first solvent pair for recrystallization is ethanol-water, what would happen if hexane replaced ethanol, to make the solvent pair of hexane-water?
What is the number average degree of polymerization at the theoretical gel point which is predicted by the theory? (10 points) Hint: Use the regular definition of the number average degree of polymerization, ; x n (x n )t = Total # of structural u..
Nitrobenzene, C6H5NO2, an important raw material for the dye industry, is prepared from benzene, C6H6, and nitric acid. When 22.4g of benzene and an excess of HNO3
a sample of air contains 78.08% nitrogen, 20.94% oxygen, .05%carbon dioxide and .930% argon by volume. How many molecules of each gas are present in 1 liter of the sample at 25 degrees celsius and 1 atmosphere?
What would be the best indicator for the titration of 0.20 M CH3COOH titrated with 0.2 M NaOH? (Ka for acetic acid = 1.8 X 10-5) The pH ranges for the color change of some common acid base indicators are given below
What is the molarity of a solution made with 2.4g if LiOH (molar mass = 23.9g/mol) dissolved to make 1.5L of solution? I want to know how to set up the formula for this problem
A titanium bicycle frame contains the same amount of titanium as a titanium cube measuring 6.6cm on a side. 1) Use the density of titanium to calculate the mass in kilograms of titanium in the frame.
The rate constant for the reaction 2HI(g) -> H2(g) + I2(g) doubles on raising the temperature from 683K to 698K. What is the activation energy fro this reaction in kJ/mol
When sufficient quantity of heat has been added to reach the boiling point of a solution, what happens to any additional heat added? a) additional heat is used to maintain the boiling of the liquid as the process is endothermic
when 1.2563 g of an organic iron compound containing fe c h and o was burned in o2 2.2398 g of co2 and 0.67249 g of h2o
If the methane contained in 5.00L of a saturated solution at 25 ^circ rm C was extracted and placed under STP conditions, what volume would it occupy.
How much heat is required to warm 223 g of ice from -45.3°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C?
determine the numbers of moles of iron that would be formed from 6.2 moles of co carbon monoxide combining with excess
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