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A volume of 50.0 mL of 0.400 M HBr at 24.35 C is added to 50.0mL of .400 M NaOH, also at 24.35 C. The final temperature is 27.06 C. Assume the volumes are additive, the specific heat of the solution is 4.180 J g/C, and that the density of the solution is 1.00 g mL -1. Calculate the enthalpy change, delta H, in kj for the reaction: HBr (aq) +NaOH(aq) => NaBr (aq) +H2O (l)
At a particular temperature, N2O5 decomposes according to a first-order rate law with a half-life of 3.0 s. If the initial concentration of N2O5 is 1.0 × 1016 molecules/cm3, what will be the concentration in molecules/cm3 after 11.3 s?
Calculate the pH of a buffer solution obtained by mixing 400.0 mL of 0.200 M acetic acid solution and 100.0 mL of a 0.300 M sodium hydroxide solution.(The pKa of Acitic Acid, CH3OOH is 4.74)
What net ionic equations for the precipitation reaction or reactions that occur. What are the spectator ions in the solution
Consider the molecules CsO2, Na2O, K2O2, MgO, and H2O2 and answer the questions below. If there is more than one answer, give both separated by a comma with no spaces. Order doesn't matter.
Calculate the pH of a solution that results from mixing 37.6 mL of 0.127 M ammonia with 48.3 mL of 0.119 M ammonium chloride.
The equilibrium amounts would stay the same the equilibrium would shift to the right making more reagents the equilibrium would shift to the left making mroe reagents the equilibrium would shift to the right making more products the equilibrium wo..
2K(s)+2H2O(l)--> 2KOH(aq) + H2(g) A 5.00 g chunk of potassium is dropped into 1.00 kg water at 24 deg C. What is the final temperature of the water after the preceding reaction occur.
Decomposition of KClO3 is sometimes used to prepare small amounts of O2 in the laboratory: 2KClO3(s) 2 KCl(s) + 3 O2(g). How many grams of O2 can be prepared from 4.50 g of KClO3?
Fumaric acid, a diastereomer of maleic acid, requires a much higher temperature before it dehydrates; when it does, it also yields maleic anhydride.
A gas originally at 30.0 C and 1.00 atm pressure in a 3.9L flask is cooled at constant pressure until the temperature is 11C. The new volume of the gas is _______ L.
Make a list of the operations you will need to perform in order to display a spectrum of your food dye on the spectrophotometer.
What is the pH of the solution when the hydronium ion + concentration of 0.15 M CH3COOH is 6.3 × 10.
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