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An aqueous solution containing 5.85g of an optically pure compound was diluted to 800.0mL with water and placed in a polarimeter tube 10.0cm long. The measured rotation was -5.93degrees at 25degrees C. Calculate the specific rotation of the compound.
buffer that has a pH of 9.80 and an osmotic pressure of 1.04atm at 298 K. What masses of HCN and NaCN should you use to prepare the buffer? mHCN, mNaCN =
If O2 is collected over water at 40.0 Celsius and a total pressure of 737 mmHg, what volume of gas will be collected for the complete reaction of 23.92 g of NiO?
Solid iron reacts with chlorine gas to produce iron(III) chloride. If 10.0 grams of iron reacts with excess chlorine gas and 18.5 grams of iron(III) chloride is produced,
Calculate the mass of ascobic acid in the whole tablet( use mass of whole tablet) c) Calculate the %error in the mass of ascobic acid in one whole tablet
the density of thiophene, C4H4S is 1.065 g/mL. A solution is made by dissolving 15.0 g of thiphene in 250.0 mL of toluene. Calculate the Molarity
How many grams of sodium azide, NaN3 are needed to react by the equation below in order to inflate a 50.0: air bag with N2(g) at 298K and 1.20 atm? NaN3(s) -------> Na (s) + N2
what is the heat flow of hot water added to cold water? What is the heat flow of the cold water? hot water was 52.5 C the cold water was 21.7 C the final temperature was mass of cold water was 49.35g
Explain why the salt of a weak acid, as well as the acid itself, must be present to form a bu?er solution.
What is the minimum volume of water needed to recrystallize 50 mg of phthalic acid? How much phthalic acis will remain in solution after recrystallization?
2.0 moles of a gas was collected in the lab at a temperature of 1.1 degrees C and a pressure of 9.5 atm. What volume will the gas occupy under these conditions.
write structures for the various aldol condensation products you expect from the aldol self-condendsation of 2-butanone
what is the minimum rate that fresh air has to be supplied to the room so that the concentration of CO2 in the room doesn't exceed 0.500% by mole? Assume the room is well mixed, and the volume of the solid dry ice does not change. mol air/min
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