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What volume of 0.200M HCl would be required to neutralize 30.00mL of 0.158M Ca(OH)2? Don't forget stoichiometry.
A proton orbits just at the surface of a charged sphere of radius 0.83 cm. If the speed of the proton is 4.96 X105 m/s, what is the charge on the sphere?
Write down an expression for the vertical velocity w(z) in terms of the constant S, the funnel radius r(z), and the density of water rhow (also constant). Pay attention to units. You can use rhow =
A car drives north at 46 for 10 and then turns east and goes 5.0 at 60 . Finally, it goes southwest at 30 for 6.0. What is the average velocity?
The vapor pressure of benzene (C6H6) is 120 torr at 27.0C, and its normal boiling point is 80.1C. What is the molar heat of vaporiza- tion of benzene?
If the coefficient of friction between the road and the tires on a rainy day is 0.1, what is the minimum distance in which the car will stop? What is the stopping distance when the road is dry and t
What friction force must act on the bottom of the ladder to keep it from slipping? Neglect the (small) friction force between the smooth wall and the ladder.
The helical molecule acts like a spring and compresses 1.23% upon becoming charged. Determine the effective spring constant of the molecule.
120L weather balloon is filled with 5.9 moles of helium has a small leak, if the helium rate is 10mmol/hr, what is the volume after 34 hours.
If electrical energy costs $0.080/kWh, what does it cost to raise the 200 kg of water in the tank from 15 degrees Celsius to 80 degrees Celsius?
A car is moving down a street at 59 km/h. A child suddenly runs into the street. If it takes the driver 0.80 s to react and apply the brakes, how many meters will the car have moved before it begin
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^