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Zinc metal is produced by the reaction of its oxide with carbon monoxide at high temperature. The equlibrium constant for the equation
Calculate the work done in joules by the reaction when 0.35 g of Na reacts with water to form hydrogen gas at 5°C and 2.5 atm. 2 Na(s) + 2 H2O(l) 2 NaOH(aq) + H2(g)
By looking at the structure of tetrabutylammonium bromide, explain how this reagent can carry ions from the aqueous phase into the organic phase.
At equilibrium the concentration of CO (g) was found to be 0.046 M. Calculate the equilibrium constant for the reaction equation at 527 degrees celcius.
If 100 mL of a solution containing 0.001 g of a compound with a molecular weight of 150 has a measured absorbance in a 1-cm cell of 2.0, what is the compound's molar extinction coefficient?
Consider the titration of 30.0 mL of 0.048 M NH3 with 0.025 M HCl. Calculate the ph after the following volumes of titrant have been added.
How many photons are required to heat 295 of coffee from 25.0 to 62.0 ? Assume that the coffee has the same density, 0.997 , and specific heat capacity, 4.184 , as water over this temperature range.
Write a balanced chemical reaction describing the decomposition of ammonium nitrate, and calculate the standard heat of reaction using the appropriate enthalpies of formation
Write an equation to show how H2PO3- can act as a base with HS- acting as an acid. Then show H2PO3- can act as an acid with HS- acting as a base.
Calculate the pH at the equivalence point for titrating 0.170 solutions of each of the following bases with 0.170 M HBr.
Define the wavelength and amplitude of a wave. How are these related to the energy of the wave
Calculate the expansion work done against a constant external pressure of 0.991 atm and at a constant temperature of 18°C. Assume that the initial volume of dry ice is negligible and that CO2 be
What would be the major product if 1,4-dibromo-4-methylpentane was allowed to react with one equivalent of silver nitrate in ethanol. It is for a lab on the relative reactivity of alkyl halides in n
AgNO3 is mixed with a 230 mL sample of a solution that is .13 M in NaCN. After the solution reaches equilibrium, what concentration of Ag remains?
Calculate the Gibbs free energy change of transformation at 286 K and 1 atm. Tin transforms from gray tin to white tin at 286 K and constant pressure of 1 atm. The following data are given for both g
A 15.0 g piece of iron (Cp = 25.09 J/mol-C) is heated to a temperature of 47.0 ?C and then placed in contact with a 275 g piece of copper at 20.0 ?C (Cp = 25.46 J/mol-C). What was the final temperat
What is the change in internal energy (?E) when a system loses 10 kJ of energy and 5000 J of work is done on the system?
25.0 mL of a gas with a pressure of 1.00 atm is contained in a balloon at 25.0 C. The balloon is then cooled to 5.0 C, and the pressure is found to be 0.750 atm. What is the volume of the gas under
A 15 gram piece of iron is heated to a temperature of 47.0 ?C and then placed in contact with a 275 g piece of copper at 20.0 ?C (Cp = 25.46 J/mol-?C). What was the final temperature of the two piec
The specific heat of liquid bromine is 0.226 J/g-K. How much heat (J) is required to raise the temperature of 10.0 mL of bromine from 25.00 °C to 27.30 °C? The density of liquid bromine is 3
Outline the mechanism of the reaction of acetyl chloride with NaN3 to give acetyl azide. This reaction is known as Nucleophilic Acyl Substitution.
A 100.0ml sample of 0.100M methylamine(CH3NH2, kb=3.7x10-4) is titrated with 0.250M HNO3. Calculate the pH after the addition of each of the following volumes of acid. a) 0.0 ml b) 20.0 ml c) 40.0 m
A buffer solution is 0.100 M in both HC7H5O2 and LiC7H5O2 and has a pH of 4.19. Which of the following pH values would you expect from the addition of a small amount of a dilute solution of a strong
What molarity of aqueous sodium chloride solution can be expected to show the same conductivity as 0.0050 M aluminum sulfate at 12,500 units.
Explain how the vapor pressure of a compound is related to the liquid-vapor equilibrium and its equilibrium constant.How would it vary with the addition of more liquid?