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Problem- What is the balanced molecular equation, total ionic equation and net ionic equation for ammonium chloride and lead(II) acetate?
2 mol of a compound is allowed to react in a foam coffee cup that contains 101 grams of water. the reaction caused the temperature of the water to rise from 21 to 24.7 C. What is the enthalpy of the reaction?Assume that no heat is lost to the surr..
A solution is made by dissolving 0.549 mol of nonelectrolyte solute in 823 g of benzene. Compute the freezing point AND boiling point of the solution
An aqueous solution of an unknown, monobasic weak base has an initial molarity of 0.139 M and a final [OH-] of 0.0000316M. What is the kb of the unknown base
radioactive isotope x has been found in rock units s and q. isotope x breaks down into isotope z with a half life of
Calculate the solubility of Ca(OH)2 in a 0.469M CaCl2 solution at 31°C, given that the Ksp of Ca(OH)2 is 4.96 x 10-6 at that temperature. Give your answer in milli Molar units
What is the molarity (M) of a solution that contains 2.08 grams of NaOH (MM = 40.00 g/mol) in 79.65 mL of solution.
Consider 4.70 of a gas at 365 and 20. . If the container is compressed to 2.00 and the temperature is increased to 38 , what is the new pressure, , inside the container? Assume no change in the amount of gas inside the cylinder.
A 275mL sample of O2 is collected over water at 60 degrees C the total pressure 755 torr what is the volume of O2 at STP?
If the rate of a reaction increases by a factor of 8.2 when the temperature is increased from 27.1oC to 51.9oC, what is the activation energy for this reaction in kJ/mol
three student chemists measured 50.0 ml of 1.00 m naoh in seperate styrofoam coffee cups calorimeters. brett added 50.0
Calculate the pH of the solution resulting from the addition of 20 mL of 0.10 M NaOH to 100 mL of 0.10 M HCN (Ka = 4.9x10^(-10))
Calculate the quantity of energy produced per mole of -235 (atomic mass = 235.043922 ) for the neutron-induced fission of -235 to produce -137 (atomic mass = 136.9253 ) and -97 (atomic mass = 96.910950 ).
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