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A 25.0 mL sample of 0.125 molL-1pyridine (Kb=1.7×10-9)is titrated with 0.100 molL-1HCl.
Calculate the pH at 10 mL of added acid. Express your answer using two decimal places.
Calculate the pH at 40 mL of added acid. Express your answer using two decimal places.
Unpolarized white light is incident on a polarizer and then falls on an analyzer whose TA (Transmission Axis) makes an angle of ?= 23.5? with the polarizer. What is the fraction of the original light transmitted through both the polarizer and analy..
A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is 1.85 hours. What is density of the planet? Assume that the planet has a uniform density.
The potential energy is zero at infinity. Calculate the potential energy of the initial state.
A small object of radius r and mass m is released at the edge of a round bowl with radius R>>r and rolls toward the bottom. What fraction of the kinetic energy is rotational if the object is (1) a marble, (2) a coin, and (3) a point particle (i.e r=..
At every point on the surface of a sphere of radius 0.4 m the electric field is radially outward, with a magnitude of 20 N/C
At NASA's Zero Gravity Research Facility in Cleveland, Ohio, experimental payloads fall freely from rest in an evacuated vertical shaft through a distance of 132 m. How fast will the payload be traveling when it reaches the bottom of the shaft
Which cart experiences more force when one of them starts the process at rest? Which cart experiences more force when both carts are moving and have unequal masses? What is the overall effect of the cart's velocity on the measured force, and..
If we push an object at constant velocity, how much friction acts on the object compared to our pushing force: A) equal to the pushing force B) greater than the pushing force C) less than the pushing force D) none of the above
Find the only way to construct a length from the parameters in the Schrodinger equation for the harmonic oscillator. Compare the result with the classical amplitude of oscillation when the energy is hw/2.
A small loop of area A=7.4 mm^2 is inside a long solenoid that has n=747 turns/cm, find the amplitude of the emf induced in the loop
A small piece of dust of mass m = 1.6 g travels horizontally through an electric air cleaner in which the electric field is 511 N/C. What is the charge on the dust particle
although the evidence is weak there has been concern in recent years over possible health effects from the magnetic
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