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An aqueous solution made by dissolving 168 mg of an unknown compound (a nonelectrolyte) in enough water to make 500.0 mL of solution, develops an osmotic pressure of 5.22 torr at a temperature of 23.5 °C. What is the molecular weight of this unknown compound?
In this exercise it was also assumed that the calorimeter was a perfect insulator and that no heat was lost to the surroundings.
How many joules of energy are absorbed by the silver? How many joules of energy are absorbed by the water?
P4(s) + F2(g) PF3(g) What mass of F2 is needed to produce 151 g of PF3 if the reaction has a 79.3% yield?
How would you make 2-methyl-1-phenyl-3-pentanone from the following available compounds ethanol, isopropyl alcohol, and toluene?
If 0.1800 g of impure soda ash (Na2CO3) is titrated with 15.66 mL of 0.1082 M HCl, what is the percent purity of the soda ash. Na2CO3(aq) + 2 HCl(aq) ? 2 NaCl(aq) + H2O(mc048-1.jpg) + CO2(g)
How would the stereochemical outcome of the bromination reaction differed if we would have started with cis-cinnamic acid
If one reacts a double bond with bromine in chloroform a dibromide is obtained. However, if one reacts bromine in water with a double bond, a vicinal halohydrin is formed. Provide an explanation for this result and show a mechanism for the reactio..
a mass of 48.5 g of a certain substanse can be disolved in 29.1 cm3 of water at 20 degrees celcius. calculate the
Use the van der Waals equation of state to calculate the pressure of 4.00 mol of NH3 at 455 K in a 5.90-L vessel.
When 24 mL of a 190 mL stock solution containing 1.8 M BaF2 is diluted to 78 mL, what is the concentration of Ba2+ in the new solution?
Calculate the overall energy change in kilojoules per mole for the formation of CaCL(s) from the elements. The following data are needed
A hypersaline solution with a molality of 4.53m has a salt content so high that the mass of the solution per 1000 grams of water is 1265g. calculate the molarity
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