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1 ml of dry THF containing 8.3 x 10-4 mol of Na and 8.9 x 10-4 mol of naphthalene was injected into 52 ml dry THF containing 0.052 mol styrene at -70 °C. After a few minutes, when propagation was complete, methanol was added to kill the living ends, the reaction mixture was warmed to ambient temperature and the polymer was isolated by precipitation. What is the Mn and Mw of the polystyrene formed?
You obtain the following six measurements for the mass of water delivered by a special calibrated volumetric pipette: 1.180 g, 1.185 g, 1.181 g, 1.173 g, 1.182 g, and 1.181 g. determine the mean and confidence interval of these measurements at a c..
A 388 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 640. mmHg. Calculate the moles of Ar present.
What is the ethanol content of the mouthwash sample?
What is the alkalinity of the river, What concentration of acid, for example, HCl, would result in a pH of 7.5
how many years would it take for the geothermal system to pay for itself. assume that you need to replace an exiting system and that you can obtain the govt. grant to do so. please show all ur calculation
Calculate the number of kilograms of nitrogen, N2, needed to fill 50 L cylinder to a pressure of 10 atm at temp 25 degrees celsius
flask contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret contains 10.0 mL of 0.220 M NaOH. 1. what volume of NaOH is needed to reach the end point of the titration?
Consider the titration of 25.0 mL of 0.132-M of KX with 0.117-M HCl. The pKa of HX = 8.80. Give all pH values to 0.01 pH units. a) What is the pH of the original solution before addition of any acid? b) How many mL of acid are required to reach the e..
Polonium metal crystallizes in a lattice which contains only one Po atom per cubic unit cell. The radius of polonium atom is 1.67 A. Calculate the density of the polonium metal
Please In the hydrolization of aspirin, why is the mixture simmered gently and carefully during hydrolysis and why is it unwise to boil it vigorously
There is a horizontal line representing the separation point between the liquid phase and the gas phase in the middle of the container. Use Xs to represent the 25 molecules in each container and place those molecules where you would expect them to..
how much of a 50 acid solution should be added to 40 gallons of a 25 acid solution to make a mixture that is 30
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