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How long will it take 10.0 mL of Cl2 gas to effuse through a porous barrier if it has been observed that 76.3 minutes are required for 10.0 mL of HCl gas to effuse through the same barrier?
Calculate the pH of the solution made by adding 0.50mol of HOBr and 0.30 mol of KOBr to 1.00 L of water. The value of Ka for HOBr is 2.0×10-9.
At t = 5.0 seconds, the cheetah is standing still, having knocked over the gazelle. What is the average acceleration of the cheetah from t = 0 to t = 5.0 seconds?
What is the difference in blood pressure (mm-Hg)between the top of the head and bottom of the feet of a 1.60 m tall person standing vertically
What is the percent yield of ferrous sulfide if the actual yield is 220.0 g and the theoretical yield is 275.6 g?
An object is 9.27 cm from the surface of a reflective spherical Christmas tree ornament 8.38 cm in diameter. What is the position of the image?
A roof tile falls from rest from the top of a building. An observer inside the building notices that it takes 0.15 s for the tile to pass her window, whose height is 2.2 m. How far above the top of
A point source of light is 35.0 cm below the surface of a body of water. Find the diameter of the circle at the surface through which light emerges from the water. Water has an index of refraction
Calcaulate the number of electrons in a small electrically neutral silver pin that has a mass of 10.0 g.silver has 47 electrons per atom.
A 100 mL buffer solution initially has 1.00 M HClO (Ka=3.0*10^-8) and .75 M NaClO. Upon the addition of 100 mL of .10 M NaOH, what is the limiting reactant
An electron in a circular path perpendicular to a constant magnetic field with a magnitude of 1.00mT. The angular momentum of the electron about the center of the circle is 3.000*10^-25. Determine t
The length of a simple pendulum is 0.73 m, the pendulum bob has a mass of 307 grams, and it is released at an angle of 12° to the vertical. With what frequency does it vibrate? Assume SHM. What
An analyst planned to use barium chloride to make up 60.0 mL of 0.500 M Ba^2+ solution but his only source of the chloride in stock was 2.66g of BaCl2* 2H20.Knowing that NO3^- , would not interfere
Find how far from the center of the earth this location is. The mass of the earth is 5.98x10^24 kg. The mass of the moon is 7.35x10^22kg. The mean distance between the moon and the earth is 3.85x10^
A 1-L flask is filled with 1.25g of argon at 25 °C. A sample of ethane vapor is added to the same flask until the total pressure is 1.10atm . What is the partial pressure of ethane, Pethane, in the
A cylindrical shell of radius 7.00 cm and length 230 cm has its charge uniformly distributed on its curved surface. The magnitude of the electric field at a point 23.0 cm radially outward from its
Find the force that the blood vessel must exert on the drop of blood in part (a)
A snowball is launched horizontally from the top of a building at v = 19.7 m/s. If it lands d = 35.5 meters from the bottom, how high is the building?
Find the maximum linear speed of a person sitting on the merry-go-round 6.50 m from the center. and Find the person's maximum radial acceleration.
What constant acceleration does Mary now need during the remaining portion of the race, if she wishes to cross the finish line side-by-side with Sally?
In a HWE reaction, a 1,2-disubstituted alkene was formed in which the olefinic protons exhibited at vicinal coupling of 9.0 Hz in the 1H NMR. what is the stoichiometry of the double bond?
As a student was swirling the flask, some NaOH solution, from buret, spilled on the bench top. What will the effects be on the calculated molarity of NaOH?
the average adult human male has a total blood volume of 5 liter. if the concentration of sodium ion in this individual is 0.135M, what is the mass of sodium ion circulating in the blood .
what is the molar concentration of chloride ions after 225 ml of 0.625 MKCL are mixed with 615 mlof 0.385M MgCl2? The final volume of the solution is 840ml
A diver stands at the end of of a massless diving board. (a) if the mass of the diver is 134kg and the board is 9m long, what is the torque due to gravity on the diving board with a pivot point at t