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At 25 degrees celsius at 0.50 g sample of polyisobutylene (a polymer used in synthetic rubber) in 100.0 ml of benzene solution has an osmotic pressure that supports a 5.1mm column of solution (d = 0.88 g/mL).What is the molar mass of the polyisobutylene? (For Hg d=13.6 g/ml)
Describe the preparation of 1.5 liters of a 0.1 M acetate buffer, pH 5.0, starting from solid sodium acetate trihydrate
write a balanced chemical equation for the reaction that occures in the experiment (B) Give the net ionic equation for this reaction
When atoms of the hypothetical element X are placed together, they rapidly undergo reaction to form the X2 molecule. Would you predict that this reaction is exothermic or endothermic?
The mixture is ignited with a spark and it reacts to form H2O (l)liquid water. determine the temperature of water?
Draw the lewis dot structure oxalate and for carbon dioxide. In terms of electronic structure, what happens when oxalate decomposes
A student used 22.0 mL of 0.1035 M NaOH to titrate 20 mL of orange juice. How many grams of citric acid were present in the sample? The molar mass of citric acid, H3C6H5O7, is 192.12 g/mol. H3C6H5O7(aq) + 3NaOH(aq) Na3C6H5O7(aq) + 3H2O(l)
On average, what percentage of random rolls of three (3) regular playing dice should result in a combined value of 5
In a particular redox reaction, Cr is oxidized to CrO42%u2013 and Ag is reduced to Ag. Complete and balance the equation for this reaction in acidic solution. Phases are optional.
At 0.0 degrees C, if the volume of air is 1.5 mL and the pressure of the atmosphere that day is 685 mmHg, what is the number of moles of air?
Suppose you have made 1L worth of a mixture of methanol and water, by mixing 3 parts of methanol and 2 parts of water by mass. Assume for simplicity that the volume of the mixture is exactly equal to the sum of the volumes of the ingredients
Calculate how many milliliters of carbon dioxide would be produced theoretically from 20g of sucrose at 25 degrees Celsius and 1 atomosphere pressure.
If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process'. The diffusivity under this condition is called 'Knudsen diffusivity'
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