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The original molarity of a solution of formic acid (HCOOH) with a Ka= 1.7*10^-4 whose pH is 4.52 at equilibrium is: A. 8.52 *10^-9 B. 2.24*10^-4 C. 6.78*10^-3 D. 3.54*10^-5 E. 5.32*10^-7
Given a column of air with a pressure of 1.57 x 10^5 Pa and an area of 1.12 m^2 and given that the acceleration due to gravity is 9.8 m/s^2, what is the mass of this column
Dibenzalacetone has two carbon-carbon double bonds. How many geometric isomers are possible? Draw all possible geometric isomers of the product and look up their melting points.
Fe(NO3)3, 5 drops of 0.1 M KCNS why are ions present when you mix those solutions? I also conducted the experiment using an unknown and got the same results for both.
Calculate the molar mass of naphthalene, the organic compound in mothballs, if a solution prepared by disovlving 7.50g of naphthalene in exactly 150g of benzene has a freazing point 2.0 degrees
Also calculate the pressure in atmospheres using the van der Waals equation. For N2, a=1.35 (L^2?atm)/mol^2, and b=0.0387 L/mol.
Find the concentration of calcium ions in a solution made by adding 3.50 g of calcium fluoride to 750. mL of 0.125 M NaF. [For CaF2, Ksp = 3.95 ? 10-11.]
100 ml sample of hard water is titrated with the ETDA solution in problem 2. the volume of EDTA required to reach the end point is 22.44 ml
A solution of 16.1 g of an unknown solute in 600 grams of water boils at 100.28 C. What is the molar mass of the solute
In a titration of HNO3, you add a few drops of phenolphthalein indicator to 50.00 mL of acid in a flask. You quickly add 26.50 mL of 0.0502 M NaOH but overshoot the end point, and the solution turns deep pink.
The nuclide 18f decays by both electron capture and beta plus decay. Find the difference in the energy released by these two processes. The atomic masses are 18F = 18.000950 and 18O= 17.9991598.
A water balloon with a volume of 260.0 L has launched at 20 degrees celcius at sea level where the atmospphereic pressure is 1.00 atm.
What is the molarity if pH at the stoichiometric point is 8 and the volume of base needed is twice the volume of acid being titrated? What is the molarity of the base
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