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In three 100 mL volumetric flasks, sequentially dilute the standard stock solution by pipetting aliquots of 1.00, 2.00, 5.00, into them, add 20.00 mL of ISA to each, and dilute to mark with water and mix. In a fourth but 250 mL volumetric flask, pipet a 25.00 aliquot of the stock solution, add 50.00 mL of ISA, and dilute to mark with water and mix. (You will need the extra volume of this most concentrated solution for further studies.) Record your actual standard concentrations accounting for the dilution as Cstd1, Cstd2, Cstd3, and Cstd4, respectively.
Calculate the heat given off by the burning Mg in kJ/g. b)Calculate the heat given off by burning Mg in kJ/mol
At what wavelength do you measure the change in absorbance to assay for enzyme X? Does the absorbance increase or decrease over time?
Draw the major organic product from reaction of 1-butyne with NaNH2, then CH3Br. If no reaction occurs, write ethane, CH3CH3.
Calculate the partial pressure of ammonia at equilibrium when a quantity of ammonium idodide in heated to 400 degree C.
calculate the final temperature of a mixture of 130.0 g of ice initially at -22.5 Celsius and 310.0 g of water initially at 80.5 Celsius.
Where on the modern periodic table would you probably find an element that is a dense gas at room temperature? EXPLAIN 3) What should be the most metallic element?
Imagine that a chemist has cyclohexanone, triphenylphosphine, butyllithium, and 2-bromobutane.
Lithium iodide has a lattice energy of -7.3 times 10^2kJmol and a heat of hydration of -793kj/mol. Find the heat of solution for lithium iodide.
Eventually, the water becomes saturated with respect to NaCl. Write a balanced chemical reaction illustrating the precipitation of NaCl and explain saturation
Calculate how many grams of Ni2+ are present in 3.36 moles of nickel(II) fluoride(NiF2) and also determine the number of moles of F- ion are present in 4.82 grams of nickel(II) fluoride.
16.57 The complex [Ni(NH3)6]2+ has a ligand field splitting of 209 kJ·mol-1 and forms a purple solution. What is the wavelength and color of the absorbed light.
The boiling point of the solvent and of the solution and the weight of the solute and solvent. The freezing point of the solvent and of the solution and the weight of the solute and solvent.
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