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In a coffee-cup calorimeter, 1 mol KOH and 1 mol HBr initially at 23.5 oC (Celsius) are mixed in 100g of water to yield the following reaction: KOH + HBr ? K+(aq) + Br-(aq) + H2O(l) After mixing the temperature rises to 78.2 oC. Calculate the change in enthalpy of this reaction. Specific heat of the solution = 4.184 J/(g oC) State your answer in kJ with 3 significant figures. Don't forget to enter the unit behind the numerical answer. The molecular weight of KOH is 56.2 g/mol, and the molecular weight of HBr is 80.9 g/mol.
What must be the velocity, in meters per second, of a beam of electrons if they are to display a de Broglie wavelength of 83.7 m
Titrate with 0.1005 M NaOH and arrive at an endpoint at 24.20 ml. You know that at the final pH both protons have been titrated. What is the Molar Mass of the acid
Compute percent C16H34 that reacted to form CO(g) in the process. If experiment carried out at constant V, how much heat would have been released?
At 63.5oC the vapor pressure of water is 175 torr and that of ethanol (C2H5OH) is 400 torr. A solution is made by mixing equal masses of water and ethanol.
Draw the major monoalkylation product(s) you would expect to obtain from reaction of benzoic acid with chloromethane and AlCl3. If there is more than one product draw all in the same window.
soultion of silver nitrate is mixed with 400.0 ml of 0.200 M calcium chloride. What is the concentration of cl- in solution after the reaction is complete
calculate the amount of heat required to completely sublime 88.0 g of solid dry ice co2 at its sublimation temperature.
At low temperatures, xenon freezes to a solid having a density of 5.653 g/cm3. Below 84 K, argon also freezes to a solid that has a similar structure but different volume and mass.
What is the minimum quantity (in grams) of atmospheric oxygen required to completely convert 3.77 moles of ethanol into carbon dioxide and water
Calculate the mass of silver chloride in grams required to make 4.4g of silver plating.
How much heat is evolved when 243 g of ammonia gas condenses to a liquid at its boiling point?
H2SO4, for the first step instead of concentrated HNO3 . What changes will be observed for the initial reaction with copper metal?
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