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A gas has a mass of 0.305 g, volume of 25 ml at 2 ATM and 0 degrees Celsius. The gas consists of bromine and fluorine. What is the molecular weight and the chemical formula?
how does the structure of an atom determine the atoms emission and absorption spectra.
Calculate the standard free-energy change for the following reaction at 25 degrees C. 2Au^3+(aq) + 3 Cr(s) 2Au(s) + 3Cr^2+(aq) delta G^degree= ? KJ/mol
What is the change of molar Gibbs energy for the freezing of water at -10C? The vapor pressure of H2O (liquid, -10C) is 286.5Pa. The vapor pressure of H2O (solid, -10C) is 260Pa. At -10C the molar volume of supercooled water
One of my pre-lab questions asks me to add one of two steps to the beginning of the mechanism for the reaction of benzopinacol with I2/HOAc to benzopinacolone to show the function of I2 in this rearrangment.
Cake alum, aluminum sulfate, is commonly used to purify sewage. What mass of precipitate, aluminum hydroxide, forms whn 185.5 mL of 0.533 M NaOH is added to 627 mL of a cake alum solution that contains 15.8 grams per liter
Which of the following species are amphiprotic in aqueous solution? For such a species, write one equation showing it acting as an acid, and another equation showing it acting as a base. OH¯, NH4+, H2O, HS¯, NO2?, HCO3?, HBr
During a breath, the average human lung expands by about 0.50L. If this expansion occurs against an external pressure of 1.0 atm, how much work in J is done during the expansion?
The following compounds are dissolved in 1.00 L of water: 0.180 mol HA (Ka = 1.36 x 10-3), 0.020 mol NaA, 0.08 mol HNO3, and 0.08 mol Ca(OH)2 (strong base). What is the pH of the resulting solution
The Kf for the formation of Ag(NH3)2+(aq) is 1.7 x 10^7. Write the equilibrium equation that represents the formation of this complex ion.
Use values of Ksp for Zn(OH)2 and Kf for Zn(OH)4-2 (page 330) to predict if a precipitate will form when you prepare a solution which contains 0.010 M Zn2+ and 1.0 M NaOH.
Write the overall equation for the reaction. B) Do you expect this reaction to go by an E1 or an E2 mechanism?
How many grams of acetic acid will you need to prepare the 500 mL buffer? Note that the given concentration of acetate refers to the concentration of all acetate species in solution.
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