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Find the concentration of calcium ions in a solution made by adding 3.50 g of calcium fluoride to 750. mL of 0.125 M NaF. [For CaF2, Ksp = 3.95 ? 10-11.]
2.4 g of a hydrocarbon fuel is burned in a calorimeter that contains 262 grams of water initially at 25.00 C. After the combustion, the temperature is 26.55 C.
What is the length of the side of the unit cell for iron and what is the atomic radius?
How can you calculate the quantitative precipitation of barium in a solid mixture of sodium chloride and barium chloride
A compound containing xenon and fluorine was prepared by shinning sunlight on a mixture of X2 (0.526 g) and excess F2 gas. If you isolate 0.678 g of the new compound, what is the empirical formula
What fragmentation would give rise to the peak at m/z 45 in the Mass Spectrum. Loss of hydroxyl group.
why do we need to excess FCR? Also give 3 reasons why gallic acid is used as standard for the total phenolic assay?
Concentrated sodium hydroxide (NaOH) is 19.4 M, has a density of 1.54 g/mL, and is a strong electrolyte. What is the molality of 19.4 M NaOH? Assume NaOH(aq) dissociates completely to produce two moles of ions per mol NaOH
mass of magnesium = .021 grams initial volume = 50.00 mL final volume = 25.6 volume of liquid displaced = 24.4 volume of hydrogen gas produced = 24.4?
The pH of a 0.55 M aqueous solution of hypobromous acid, HBrO, at 25.0 °C is 4.48. What is the value of Ka for HBrO.
When 1 mol of Fe2O3(s) is formed by combustion of Fe(s)with O2(g), 824 kJ of heat is liberated. By this reaction, how many mol of Fe should be consumed in order to liberate 100. kcal of heat
Make a new solution with a total volume of 10.0 mL and How many moles are contained in 500.0 mL of solution
Determine the heats of formation or the steric energies of the exo-and endo-anhydride adducts using a molecular mechanics program. What do these energies tell you about the mechanism of the reaction
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