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An unknown element forms a yellow ion, XO . It forms a precipitate with silver ions. If 48.0 mL of a 0.250 mol/L solution of silver ions is added to a solution of the unknown ion, 1.856g of a red-brown precipitate are formed. Determine the identity of the metal X?
Determine the Ka of the ethylammonium ion (C2H5NH3+). [Kb of ethylamine (C2H5NH2) = 8.6 x10^-4]
What volume of oxygen is required to burn completely 401 cm3 (centimeters cubed) of butane, C4H10 (All substances are gases measured at the same temperature and pressure.)
from the ratio of the mass of the black product to the initial 5g placed in the flask could the remaining black
To what volume should you dilute 45mL of a 12M stock HNO3 solution to obtain a 0.121M HNO3 solution
Write the structures of all the alkenes that can be formed by dehydrohalogenation of each of the following alkyl halides.
In the purification of a mixture, what determines whether you use extraction or recrystallization as the initial procedure
A lactic acid/lactate ion buffer solution contains 0.29 M hc3h5o3 and 0.80 M C3H5O3-, respectively. The Ka value of lactic acid is 1.4X10^-4. Calculate the pH of this buffer.
what mass of solid sodium formate of mw 68.01 must be added to 140 ml of 0.57 moll formic acid hcooh to make a buffer
Brass has a density of 8.40 g/cm3 and a specific heat of 0.385 J g-1 oC-1. A 11.2 cm3 piece of brass at an initial temperature of 154oC is dropped into an insulated container with 138.4 grams of water initially at 24.1oC. What will be the final te..
Calculate the internal energy change (delta(U)) for vaporization of 100 g of CI2(l) at this temperature and 1 bar? (b) Calculate its molar entropy change (delta(S)) for vaporization at this condition.
Given the thermodynamic data in the data table below, calculate the equilibrium constant for the reaction: 2SO2 (g) + O2(g/0 2SO3(g), Substance Delta Hf (kj/mol) Delta S (J/K *mol)
the density of the solution is 1.41 g/mL at 25 degrees celcius. What is the molarity of nitric acid in this solution?
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