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Does coal flue gas react with sand or glass.. if so under what conditions?
consider the equation aaq 2baq 3caq 2daq. in one experiment 45.0 ml of 0.050 m a is mixed with 25.0 ml 0.100 m b. at
A reaction has a rate constant of 0.0686 sec-1; how long will it take (in minutes) until 0.198 mol/L of the compound is left, if there was 0.715 mol/L at the start? (give answer to 3 sig figs using E notation)
Solid argon (Ar) is face-centered cubic. The edge length of the unit cell is 4.79 angstroms (1.00 angstrom= 1.00 x10-8cm). Compute (a) the radius of Ar in cm, (b) the volume of the unit cell in cubic centimeters
Calcium chloride is commonly utilized in first aid "hot packs". The lattice energy of calcium chloride is 2223.4 kj/m. The energy of solution is -2304.7 kJ/mol. Explain how much heat would be generated in a hot pack from the dissolution of 100.0 g..
Problem- When 50.00mL of 1.000 x 10^-1 M Lead (II) nitrate solution are combined with 50.00mL of 1.000 x 10^-1 M sodium iodide solution, a precipitate is formed. 1.021g of dry solid was obtained.
How much energy (in J) is required to change the temperature of 1.00 kg Fe from 25.0°C to 1515°C? The specific heat capacity of iron is 0.449 J/g*°C.
A calorimeter is not a perfect insulator. For a reaction that is endothermic, will the reported (delta)H be too high, too low, or unaffected if the heat exchange with the calorimeter is ignored
Since most potassium salts and nitrates are soluble in water, PbCrO4 must be the precipitate. The equation for this reaction is: Pb2+ + CrO4 2- -> PbCrO4. Calculate the theoretical yield using the starting quantities of both reactants.
Question- How many grams of silver sulfate can be dissolved in 450. ml of .200M sodium sulfate solution? (ksp for Ag2SO4 is 1.2* 10^-5)
Question- The flask shown here contains 0.419g of acid and a few drops of phenolphthalein indicator dissovled in water. The buret contains 0.190 M NaOH. What volume of base is needed to reach the end point of the titration
A sample of 2.50 mole N2 is originally confined to 20 L at 270 K and then undergoes adiabatic expansion against a constant pressure of 600 Torr until the volume has tripled. Calculate q, w, ?T, ?U, and ?H.
The human body obtains 955 of energy from a candy bar. If this energy were used to vaporize water at 100.0 , how much water (in liters) could be vaporized? (Assume the density of water is 1.00.)
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