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Problem- Calculate the pH of a 500.0 mL solution containing 0.75 M HC3H5O3 (Ka = 1.4 x 10-4) and 0.25 M NaC3H5O3.
a. 3.4
b. 3.9
c. 4.6
d. 5.1
Explicate the each step. Explicate the process and each step
A 2 cm string is fastened at both sides is plucked. What is the wavelength of the n = 4 standing wave? How many nodes does it contain?
Question- Blood plasma is the solution remaining after cells (red, white, etc...) are removed from whole blood. The clinical analysis of free calcium in plasma can be down with a calcium liquid membrance ion-selective electrode.
Question- A sample of O2 gas is stored at 30.0 C and 755 torr. If the volume was 125 mL, how much did the oxygen weigh
nickel ion forms the complex ion hexaamminenickel (II) with a formation constant of(Kf) of 5.6 x 10 ^8. initially the complex is formed when .002 M nickel sulfate is added to .10 M ammonia.
80.0 of is initially at room temperature (22). A chilled steel rod at 2 is placed in the water. If the final temperature of the system is 21.5, what is the mass of the steel bar?
A sample of neon gas is held in a rigid 1.814L container with a pressure of 1.273atm at 25 C. 3.193g of an unknown gas is added to the container. The temperature remains constant, but the pressure rises to 2.386atm. What is the molar mass of the a..
Which of the following pairs of molecules is listed in order of decreasing net dipole moment (from more polar molecule to less polar molecule)
If 500mL of gas at 700torr as well as 22C is allowed to expand in 750mL at 20C, Explain what is the final pressure of the gas in the atmosphere
A 2.74g lead weight, initially at 10.8Celcius, is submerged in 7.80g of water at 51.9Celcius in an insulated container. What is the final temperature of both substances at thermal equilibrium
The Henry constant of CO2 in biological fats is 8600torr. Determine concentrations of CO2 in biological fats in micrograms per gram at normal conditions. Presume that air contains 0.035% of CO2 by volume.
We are unable to detect iron via atomic spectroscopy. The problem is we have added Fe-EDTA in a formulation. For detection of Fe, we digest the formulation (sample) with H2SO4 (usual practice) but we are unable to detect Fe by atomic spectroscopy
Which of the following indicators would be the best to use when 0.050 M benzoic acid (Ka = 6.6 *10^-5) is titrated with .05 M NaOH
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