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A 100.00 ml of volume of 0.500 M HCl was mixed with 100.00 ml of 0.500 M KOH in a constant pressure calorimeter. The initial temperature of individual acid and base was 23 degree celsius. The final temperature after mixing was 25.5 degree celsius. Given the specific heat of the solution was 3.97 J. g-1. Deg.-1
a) Calculate the amount of the heat lost by the reaction in kJ.
b) Calculate the enthalpy of the reaction in kJ/mol.
A sample of steam with a mass of 0.550grams and at a temperature of 100 degrees celcius condenses into an insulated container holding 4.30grams of water at 6.0 celcius
Calculate the pH of a solution prepared by mixing 250. mL of 0.174 m aqueous HF (density = 1.10 g/mL) with 38.7 g of an aqueous solution that is 1.50% NaOH by mass (density = 1.02 g/mL).
What is the theoretical yield and percent yield for this reaction under the given conditions?
Write the reaction of butanoic acid with propanethiol.
An evacuated (empty) 276 mL glass bulb weighs 129.6375 g. Filled with an unknown gas, the bulb weighs 130.0318 g. Calculate the gas density in g/L.
Calculate the wavelength, in naniometers, of the spectral line produced when an electron in a hydrogen atom undergoes
what is the vapor pressure(in mm Hg)of a solution made by dissolving 18.3g of NaCl in 500.0g of H2O at 70 degree celcius. The vapor pressure of pure water at 70 degree celcius is 233.7 mm Hg.
In an electrolysis cell similar to the one employed in this experiment, a student observed that his unknown metal anode lost 0.238 g while a total volume of 84.90 mL of H2 was being produced
Sodium chlorate,NaClO3, decomposes when heated to yield sodium chloride and oxygen, a reaction used to provide oxygen for the emergency breathing masks in many airliners
A 3.5 L container is filled with gas at 1.00 atm. A piston then compresses the gas to 0.250 L. What is the new pressure?
What are some possible sources of error in your calculated atomic weight for Mg? A. Calculate the % Absolute error. B. Calculate the % relative error in the mass, volume, temperature, and other measurements.
Describe the bonding in N3- (Azide ion) in terms of an molecular orbital picture in which each terminal N atom is sp hybridized with one hybrid orbital accommodating one lone pair of electrons
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