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Four different salts each imparted a yellow color to a flame indicating the presence of sodium, Na+. They reacted with coldH2SO4 as follows. Identify each SALT.
a) Effervescence was observed, and the evolved gas was colorless and odorless and did not fume in the moist air.
b) Effervescence was observed, and the evolved gas was pale reddish-brown, and had a sharp odor, and fumed strongly in moist air.
c) Effervescence was observed, and the evolved gas was colorless, had a sharp odor, and fumed in moist color.
d) Effervescence was observed, and the evolved gas formed violet fumes and had a rotten egg odor
Calculate the temperature of boiling water at an elevation of 6000ft (2000m) given that the atmospheric pressure is 0.8atm. Assume delta H_vap is independent of T.
The standard free energy of the reaction represents the drive the reaction has under standard conditions to move toward equilibrium. Express the equilibrium constant numerically using three significant figures.
Solid ammonium fluoride is slowly added to 125 mL of a magnesium sulfate solution until the concentration of fluoride ion is 0.0476 M. The maximum amount of magnesium ion remaining in solution is
The density of a gaseous element at 310oC and 1.02 atm is 2.64 g/L. What is the molecular weight of the element
Construct the molecular diagram for the system of a delocalized 1,3,5,7-cyclooctatetraene. What does this predict about this system. Is there a more stable arrangement for the bonds
Calculate the pH of a buffer that contains 0.270 M hydrofluoric acid (HF) and 0.180 M cesium fluoride (CsF). The Ka of hydrofluoric acid is 6.80 x 10^-4.
How many grams of carbon dioxide will you get if you burn 400 pounds of hydrocarbon that contains 93.75% carbon to completion? the molecular mass of the hydrocarbon is 128
A sample of H3A with a mass of 0.3606g was dissolved in water and titrated with 0.16M Ba(OH)2 solution.24.5mL of base were required to reach equilibrium point. What was the MM of the acid
In the Lewis structure of HOCH2CH2OH, how many valence electrons need to be shown and how many pairs of electrons are bonding and how many are non-bonding
Provide the set of four quantum numbers that could represent the last electron added using the Aufbau principle to the Ne atom.
Camphor is mixed with methanol, then sodium borohydride is added. Then boil, add mixture to ice and stir.
a weather balloon holding 22l of gas is released at a pressure of 103kpa and a temp. of 15c. what is the temp. at 10km
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