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The PH° of formation values for water vapor and liquid water are -241.82 and -285.83 kJ/mol, respectively. Calculate the ?H° of vaporization for water in kJ/mol.
The normal boiling point of hydroquinone is 310°C. Calculate the pressure at which hydroquinone will boil at 200°C given that its Hvap is 73.38 kJ/mol.
A solid laboratory sample contains two substances, lead(II) carbonate and potassium carbonate. A 5.000 g sample of this unknown was treated with aqueous nitric acid to dissolve it, then, after further treatment to adjust the acidity
How much energy is required to vaprorize 150 ml of c6h6 at 25 c? the density of c6h6 is 0.87 g/ml and the enthalpy of vaporization is 30.8 kj/mol
Assume that fructose is a molecular solid and does not ionize when it dissolves in water.
For each pair of amino acids listed below, predict which one would be first to elute from a cation-exchange column. Assume the buffer pH begins at 3.25 and is increased in a stepwise fashion to pH 6.
buffer that has a pH of 9.80 and an osmotic pressure of 1.04atm at 298 K. What masses of HCN and NaCN should you use to prepare the buffer? mHCN, mNaCN =
The standard free energy of activation of one reaction A is 91.70 kJ mol (21.92 kcal mol). The standard free energy of activation of another reaction B is 74.50 kJ mol (17.81 kcal mol).
from your understanding of colligative propertieshow would design an experiment to measure the freezing point of a
For the following reaction, 6.72 grams of chlorine gas are mixed with excess water. The reaction yields 5.13 grams of hydrochloric acid.
The F-Cl-F bond angle between adjacent F's in ClF3 (Cl being the central atom) is closest to
If your electricity comes from a 33% efficient nuclear power plant, how many Pu-239 nuclei are produced as a result of your leaving the light on?
If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of helium?
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