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Of sublimation, recrystallization, distillation, and extraction, which purifications methods should be used to purify the following:
a) a crude solid mixture that is 90% pure
b) a solution of two compunds where one is solid and one is liquid
c) a mixture of two liquids that differ in acid/base functionality and differ in boiling point by 10 degrees
d) a compound that readily forms hydrates
Calculate the mass in grams of iodine (I2) that will react completely with 29.1 g of aluminum (Al) to form aluminum iodide (AlI3).
calculate the PH of a buffer solution prepared by dissolving 21.5 g benzoic acid and 37.7g sodium benzoate in 200.0 mL of solution?
How many moles of S8 are needed to make 0.600 moles of SF4? S8 + 8 Cl2 = 8 SCl2 ; 3 SCl2 + 4 NaF = SF4 + S2Cl2 + 4 NaCl
Determine the shape (geometry) of PCl3 and then decide on the appropriate hybridization of phosphorus in this molecule
how many grams of carbon dioxide are produced when 23.5 g of 1-pentanol react with excess oxygen in a combustion reaction?
A steel container with a volume of 500.0 mL is evacuated, and 25.0 g of CaCO3 is added. The Container and contents are then heated to 1500 K, cuasing the CaCO3 to decomposed completely
Purification of nickel can be acheived by electrorefining nickel from an impure nickel anode onto a pure nickel cathode in an electrolytic cell
The reading on the tank pressure initially rises very quickly then much more slowly eventually reaching a value of 3.27 mpa. A ssume T final=19C. How many moles of air in the tank initially ?
if 5.0 of nitrogen at 12 degree Celsius and 1.30 atm pressure reacts with the same volume of hydrogen at the same temperature and pressure, what volume of ammonia is obtained at that temperature and pressure?
What is the minimum volume of 6.0 M HCl(aq) needed to completely dissolve 3.20 g of aluminum in this reaction?
Given a relative reactivity of 5.0:3.5:1.0 (tertiary:secondary:primary) hydrogens,calculate the expected percentage of each of the three reaction products expected in the chlorination of n-pentane?
When 0.78 g of an unknown gas in contained solely in a 560 mL container, the pressure is 780 Torr at 5 degrees Celcius. What is the molar mass of the gas in grams/mole?
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