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A 50.0 mL sample containing Ni+2 was treated with 25.0 mL of .050 M EDTA to complex all of the Ni+2 and leave some excess EDTA in solution. the excess EDTA was then titrated with .050 M Zn+2, requiring 5.00 mL to reach equivalence point. What was the concentration of Ni+2 in the original solution? (EDTA forms complexes with metals in a 1:1 stoichiometry)
When a sucba diver goes to a dive shop to have her scuba tanks filled with air, the tank is connected to a compressor and filled to about 2100 psia while immersed in a tank of water (so that the compression of air into the tank will be approximate..
In which of the following species is the octet rule violated by the central atom when the central atom has a formal charge of zero?
In a separate experiment, an empty flask is weighed, 35.3 cm3 of the lubricating oil is poured into the flask and the flask is reweighed. If the scale reading was 124.8 g in the first weighing, what would it be in the second weighing
Calculate delta G in Joules/mol at 25 C when concentration of [H] is .00000010 M and [OH] is 1.0 x 10^-11.
If the pressure increases to 800. torr, how many moles of gas were added to the container? Assume a constant-volume container.
fifty mililiters of 1.00m hno3 was added to 50.5 ml of 1.00m of naoh solution. calculate the mass of the reaction
An organic substance has an enthalpy of vaporization of 29.0 kJ/mol. The compound has a vapor pressure of 524 mm Hg at 25 °C. At what temperature is the vapor pressure equal to 115 mm Hg?
The mole fraction of potassium nitrate in an aqueous solution is .0194. The density of the the solution is 1.0627 g/mL. Calculate the molarity of the solution.
Predict the product(s) if the following reaction: Cs+Br2. The equation is not necessarily balanced. Express your answer as a chemical formula
A sample of gas with a mass of 1.58 occupies a volume of 941 at a pressure of 753 and a temperature of 16. What is the molar mass of the gas.
calculate the equilibrium concentration of Ag+(aq) in a solution that is initially 0.200 M AgNO3 and 0.810 M NH3,
A compressed air car has several advantages over conventional vehicles - it has zero emissions, refueling can be done at home and there is no hazardous or rare battery chemical to deal with. The engine of such a car relies on the expansion of comp..
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