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The final temperature of a mixture of solution prepared by dissolving 2.50 gram of NaOH in 75.0 mL of water (both initially at 25 degrees C) increases to 25.5 degrees C. Is this process exothermic or endothermic? What is the enthalpy of solution of NaOH in kJ/mole?
at 50 degrees celsius the vapor pressure for methanol and ethanol are 406 and 222 torr respectively. given a mixture at
A gas at 740 mmHg pressure at 25 degrees C is cooled to -10 degrees C. What is the final pressure in mmHg?
Which two starting materials are needed to prepare the following compound
Milk will sour in about eight hours at 21*C (70*F = room temperature). How long will raw milk last in a refrigerator maintained at 5*C? Assume the rate constant to be inversely related to souring time.
What was the volume occupied by the sample under the new conditions - Determine what volume of 3.00M HCl in liters is required to react
Cyanic acid (HOCN) and isocyanic acid (HNCO) differ in the position of their electrons, but they are not resonance structures. Explain.
The equilibrium internuclear distance of deuterium iodide, DI, is 160.4 pm, where 1 pm = 1x10-12m. The relevant atomic masses are: mD = 2 amu and mI = 127 amu
Calculate the number of moles of an ideal gas in a 250. mL sealed container that has a pressure of 788 torr and a temperature of 72.1 degrees F.
Metabolic regulation is achieved via regulating enzyme activity in 3 ways: allosteric regulation, covalent modification, and enzyme synthesis/degradation.
Assuming all the NH3 dissolves and that the volume of the solution remains at 0.300L , calculate the pH of the resulting solution
As conjugated dyes get longer, two effects compete. The Equation, ?= 8mcL^2/h(2ni+1) indicates that as ni increases, the absorption wavelength should decrease, but as L increases, the absorption wavelength should increase. Which one wins and why?
celsius absorbs 281kJ of heat from a mountain climber's stove at an elevation where the boiling point of water is 89 degrees celsius, how many kJ are required to boil the water?
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