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The delta H sub f of FeBr3 is -269 kJ/mol and the delta H for the reaction 2Fe (s) + 3Br2 (g)----> 2Br3 (s) is -631 kJ/mol . Calculate the Delta H of evaporation of Br2 (l) which is a liquid at 25 degrees Celcius.
What mass of Au is produced when 18.6 ampere of current are passed through a gold solution for 29.0 minutes.
Define in terms of the electronic structure of an element, chemical activity as it relates to metals, nonmetals, and noble gases. Discuss the change in chemical activity of metals as you go down a group.
If you measure the refractive indices of two liquids and they are within 0.0001 units from eachother, how likely is it that the two liquids are identical
Find the mass fraction and mole fraction of each component, the molar mass of mixture, and it's gas constant.
the following interactions can contribute to the intrinsic binding energy during enzymatic catalysis? Choose all that apply.- hydrogen bonding
joseph failed to calibrate the spectrophotometer. As a result, all absorbance values for the standard solutions that are measured and recorded are too high.
A laboratory technician needs to make 500.0mL of a 0.25 M NaOH solution. What mass of sodium hydroxide does the technician need to use?
A 100.0 mL of acetic acid solution of unknown molarity is titrated with 0.15 M NaOH solution. The titration requires 43.25 mL of the base. Determine the molarity of the acid, CH3COOH.
Write molecular, total ionic, and net ionic equations for the reaction of AgNO3 and NaCl (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.)
In the bromination of ethane (C2H6) reaction, one wants to produce 10.0 g of C2H5Br product. How many grams of C2H6 would be needed to react with excess Br2.
A buffer solution is prepared by mixing enough acetic acid and potassium acetate to give 500ml of a solution that is 0.500 M acetic acid and 0.500 M potassium acetate. What is the pH of this buffer
A certain quantity of gas occupies 61.3 mL at 68C. If the pressure remains constant, what would be the volume of the gas at 128C?
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