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What is the purpose of a hot filtration in a recrystallization? When would a hot filtration step not be necessary or useful in a purification by recrystallization? What experimental observation of the hot solution would let you know that it was not needed?
A 1L steel tank is fitted with a safety valve that opens if the internal pressure exceeds 850 torr. It is filled with helium at 23 oC and 0.991 atm and placed in an oil bath.
determine How many grams of AlCl 3 are formed if 30.0 grams of Hydrogen are produced? It is given that the molar mass of AlCl 3 =133.33 g/mol.
what is the mass of iron in grams in the sample? a. 0.000904 g b. 0.0559 g c. 0.904 g d. 1.105 g e. 55.85 g
Alpha terpene, C10H16, is a pleasant-smelling hydrocarbon that has been isolated from oil of marjoram. On hydrogenation over a palladium catalyst, alpha terpene reacts with two molar equivalents of H2 to yield a hydrocarbon C10H20
How many grams of benzoic acid (C6H5COOH) are contained in a 100.0 mL solution at 0.39 M concentration?
What is the concentration of ammonium ion in a pH 9 solution that forms when concentrated NaOH is added
calculate the new temperature in Celcius- tank of helium gas with a pressure of 270 torr at 4 degrees celcius is heated to give a pressure of 1500 torr
A compressed air tank carried by scuba divers has a volume of 7.0 L and a pressure of 150 atm at 20C. What is the volume of air in the tank (in liters) at STP
what mass of limestone is required to remove all the sulfur dioxide formed by the combustion of 7.2 104 kg of coal that is 0.33 mass % sulfur?
If 50.0g of sulfuric acid is spilled, what is the minimum number of moles of sodium carbonate that have to be added to it to complete this reaction?
You are told that K=3.76x10^-5 for I2(g)=2I(g) at 1000K. You begin an experiment by injecting 1.00 mole of I2 into a 2.00 liter box at 1000K. When the system comes to equilibrium, what will be the concentration of I2 and I in the system at equilib..
If you predicted that no ionic compound would form from the reaction in part e, what minimum amount of AX(s) lattice energy might lead to compound formation
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