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If a chemical reaction, A + B --> C + D, is endothermic, what is the sign of ΔH for the reaction? Would the temperature recorded in the calorimeter well for such a reaction increase or decrease? Explain.
A certain reaction with an activation energy of 165 kJ/mol was run at 485 K and again at 505 K. What is the ratio of f at the higher temperature to f at the lower temperature
methane has a henrys law constant k 9.88x10-2 mollatm when dissolved in benzene at 25degrees c. how many grams of ch4
calculate the pressure exerted in the closed end of an apparatus if the atmospheric pressure is 720.0 torr and the height of the water column is 22.3 cm.
If it is known that 41.6 grams of PURE ELEMENT THAT IS NOT DIATOMIC represents 1.30 moles of this element, what is the atomic mass of the element?
A 1.000 L steel tank is fitted with a safety valve that opens if the internal pressure exceeds 1.00 x 103 torr. It is filled with helium at 19.5 °C and 0.924 atm and then placed in boiling water at exactly 100°C. What is the pressure in atm in the..
How many grams of F- must be added to a cylindrical water reservoir having a diameter of 8.88 × 102 m and a depth of 78.88 m? (b) How many grams of sodium fluoride, NaF, contain this much fluoride?
The heat capacity of the gas, at constant pressure, is 20.8 J/molK. What is the total energy change delta U (in J) for the gas
Write the balanced equation for the reaction involved in the synthesis of acetanilide from aniline and acetic anhydride.
Calculate the pH of the following solutions with the given [H+] or [OH-] and indicate whether the solution is acidic or basic
What liquid is insoluble in water and soluble in cyclohexane and alcohol; and has a boiling pint of 58 degress Celsius at 670 mm Hg.
The solubility of NaCl in water at 25 degrees Celsius is 38 g NaCl in 100 grams of water. A mixture was made using 33 g of NaCl and 100 g of waer at 25 degrees Celsius. Which term best describes the mixture?
Calculate the change in enthalpy for the CHCl3 sample and change in entropy for the CHCl3 sample. Finally, Calculate the change in entropy for the reserve and change entropy of the universe.
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