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The reaction X(s) ? X(g) is known at 25oC to have standard enthalpy, free energy, and entropy changes of 146.8 kJ, kJ, and 175.4 J/K. At what temperature (oC) does X(s) sublime?
4 Fe(s) + 3 O2(g) → 2 Fe2O3(s). If 12.5 g of iron(III) oxide (rust) are produced from 8.74 g of iron, how much oxygen gas is needed for this reaction?
A buffer solution containing 0.25 M Acetic acid and 0.56 m Sodium acetate. After addition of 0.0060 mol HCL what is Ph of buffer.
The entry of Na+ provides a free-energy input of 10.8 kJ/mol under typical cellular conditions (external [Na+] = 143 mM, internal [Na+] =14 mM and a membrane potential = -50 mV). What is the ratio of glucose concentration outside and inside cells?
A 28.0-g sample of nitrogen gas combines completely with 6.0 of hydrogen gas to form ammonia. What is the mass of ammonia formed.
Calculate the energy in joules of a 7.46 g object moving at a speed of 713 m/s. Enter in Scientific notation. Also determine how much greater the electrostatic energy is between charges
Large quantities of liquefied natural gas (LNG) are shipped by ocean tanker. At the unloading port provision is made for vaporization of the LNG so that it may be delivered to pipelines as gas.
Assuming the density of a 5% acetic acid solution is 1.0 g/ml, determine the volume of the acetic acid solution necessary to neutralize 25.0 ml of .10M NaOH. Also record this calculation on your report sheet.
The standard molar enthalpy and entropy of the denaturation of a certain protein are 512 kj/mol and 1.60 kj/K mol.comment on the signs and magnitude of these quantities , and calculates the temperature at which the process favors the denatured sta..
Calculate the pH at the equivalence point for the titration of 0.240 M methylamine
Consider the crystalization of sulfanilamide from 95% ethyl alcohol. If impure sulfanilamide is dissolved in the minimum amount of 95% ethyl alcohol at 40 degrees celcius rather than 78 degrees celcius
What is the pH of a solution that is 6.5×10-2M in potassium propionate and 8.5×10-2M in propionic acid?
If the partial pressure of NO is decreasing at the rate of 32 torr/min, what is the rate of change of the total pressure of the vessel?
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