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Calculate the entropy change when neon, at 50 celsius and 1.00 atm pressure in a container of volume 0.500 dm^3 is allowed to expand to 1.00 dm^3 and simultaneously heated to 100 celsius
Calculate the volume (in mL) of a 0.680 M KOH solution that should be added to 4.000 g of HEPES (MW=238.306 g/mol, pKa = 7.56)
percent iron in a sample that is 70.0% iron (II) ammonium sulfate hexahydrate, Fe(NH4)2(SO4)2 x6H2O.
A chemist must dilute 80.5mL of 126mM aqueous sodium thiosulfate solution until the concentration falls to 110.mM . He'll do this by adding distilled water to the solution until it reaches a certain final volume.
A 1.245 gram sample of a compound containing barium and oxygen was dissolved in hydrochloric acid to give a solution of barium ion, which was then completely precipitated out with an excess potassium chromate to give 2.012 grams of barium chromate..
210 mg Ca(OH)2 and 210 Al(OH)3. A 8.3×10^-2 M HCl, which is similar to stomach acid, is used to neutralize 5.0mL of liquid antacid. How many mililiters of HCl solution are needed to neutralize Ca(OH)2, then Al(OH)3?
For the reaction 2HI(g) H2(g) + I2(g), Kc = 0.290 at 400 K. If the initial concentrations of HI, H2, and I2 are all 1.50 × 10-3 M at 400 K, which one of the following statements is correct
A certain substance has a heat of vaporization of 69.66 kJ/mol. At what Kelvin temperature will the vapor pressure be 4.50 times higher than
Caffeine has a distrubution coefficient of 8.4 for methylene chloride/ water. How much caffiene will be extracted from a 200 mL cup of Turkish coffee (250 mg caffeiene) by 100 mL of methylene chloride?
Methyl orange is an indicator that changes color over a range from pH =3.1 to pH =4.4 . What is Ka of methyl orange
What mass of liquid water at room temperature (25 C) can be raised to its boiling point with the addition of 31.0 kJ of energy
The decomposition of hydrogen peroxide is a first-order process with a rate constant of 1.06 x 10-3 min- 1. How long will it take for the concentration
The precipitate, after having been filtered and air-dried, has a mass of .284 g. The limiting reactant in the salt mixture was later determined to be CaCl2x2H2O.
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