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a1.2356gram sample alum salt KAL(so4)2.12H20 was treated with 8-hydroxy quinoline.the precipitate formed then ignited giving 0.1245gram of AL2O3. Compute percent of purity of alum, presence of aluminum, potassium & sulphate in the sample. The mass of aluminum & potassium in the sample analyzed.
calculate the percentage by weight of oxygen in the product formed when a 2.60-g sample of selenium combines with
If the enthalpy of combustion of the compound is -2978.0 kJ/mol and the temperature of the calorimeter rises from 25.44 C to 27.7 C, how many moles of the compound were oxidized?
The mixture of solutions has a density of 1.220 g/mL and a specific heat of 5.254 J/gC. The empty calorimeter had a heat capacity of 850.0 J/C. The temperature of the entire system rose from 25.6 C to 26.7 C. Calculate the heat of the reaction, in..
Calculate the mass (in grams) of the product formed when 15.64 g of Cl2 reactant completely reacts. Assume that there is more than enough of the other reactant.
What volumes of CO2 and NH3 at 201 atm and 450.°C are needed to produce 2.54 kg of urea, assuming the reaction goes to completion?
Suppose your thermometer read consistently 1.0 o C lowered throughout both parts in the colligative properties lab. What effect would that have on your experimental value for the molar mass of your unknown solute?
What volume of O2 at 988 mm Hg and 33 degrees celcius is required to synthesize 19.5 moles of NO2.
the heat of vaporization of a liquid deltahvap is theenergy required to vaporize 1g of the liquid at its boilingpoint.
determine the amount of heat energy needed to convert 255g of substance x from 40 degrees to 300 degrees
What happens to the interference pattern that results from the diffraction of electrons passing through two closely spaced slits if the rate of electrons going through the slits is decreased to one electron per hour
A 0.150 M solution of an enantiomerically pure chiral compound D has an observed rotation of 0.12° in a 1-dm sample container. The molar mass of the compound is 135.0 g/mol. (a)What is specific rotation of D
A student adds 0.1 mol of oxalic acid (H2C2O4) and 0.1mol of sodium dihydrogen phosphate to enough water to make 1.0L of solution. The following equilibrium is established with Kc from this reaction greater than 1
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