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If a solution containing 3.23 grams of an unknown compound dissolved in 100.0 grams of water freezes at-0.97 degrees Celsius. The solution doesn't conduct electricity. Compute the molar weight of the compound. The molar freezing point depression constant for water is 1.86 degrees C kg mole -1.
Write a balanced redox equation for the seperation of Cu2+ from the other Qual 1 cations. The other cations are Na+ , K+ , NH4+ , Mg2+ , and Ca2+.
The solution filtered , then we took 25 mL of this unknown acid for titration. we use NaOH base for titration ,the volum of titrated base when it reach the equivalence point was 3.2 mL . and the concentration of NaOH is 0.1 M.
A reaction has an equilibrium constant of 8.2 X 10^3 at 298 K. At 764 K , the equilibrium constant is 0.53. Find Delta H rxn for the reaction.
What is the equilibrium constant expression for the following reaction- Pb2+(aq) + 2I?(aq)?PbI2(s) Choose from the list below and enter the letters alphabetical order.
The radioactive Co-60 isotope is used in nuclear medicine to treat certain types of cancer. Calculate the wavelength and frequency of an emitted gamma particle having the energy of 1.29 x 10^11 J.
prepare a PH = 4.00 buffer staring from 1.50 L of 0.0200 M solution of benzoic acid (c6h5cooh) and an excess of sodium benzoate
Write the equilibrium expression that agrees with the equilibrium constant in part a. Calculate the equilibrium pressure of hydrogen gas needed to give an equilibrium ratio of CH3OH to CO equal to 10,000:1
The KHP you used had not been dried. b) When filling the buret with NaOH you left a air bubble in the buret tip.The bubble was released during your first KHP titration.
mg3n2 6h2o rarr 3mgoh2 2nh3when 2.00 moles of h2o react how many grams of nh3 are
Compare the amount of energy released by the complete combustion of 1 gallon of ethanol with the amount of energy released by the complete combustion of 1 gallon of octane.
A certain temperature and pressure 2.1 L of Cl2 reacts with 4.2 L of O2. If all the Cl2 and O2 are consumed, what volume of ClO2, at the same temperature and pressure, will be produced
Diamond has a face-centered cubic unit cell, with four more C atoms in tetrahedral holes within the cell. Densities of diamonds vary from 3.01 g/cm3 to 3.52 g/cm3 because C atoms are missing from some holes.
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