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what is the ph of a buffer solution prepared from equal volumes of .25 m sol of a weak acid and .025 m sol of the salt of that weak acid. the acid has a pka of 4.82
Two identical conducting spheres each having a radius of 0.500 cm are connected by a light 1.70 m long conducting wire, Determine the tension in the wire
Decide whether or not each of the following metals dissolves in 1M HCl. For these metals that do dissolve, write a balanced redox reaction showing what happens when the metal dissolves
An electric field of 11.0 N/C directed due north is superposed on an existing electric field of 15.3 N/C directed due east
Hydrogen reacts in a fuel cell to produce water and electricity according to the reaction below. What is the maximum amount of electricity you might derive from 7.50 g of hydrogen
A small block is released from rest at the top of a frictionless incline. The block travels a distance 0.263 m in the first second after it is released
What volume of hydrogen gas is produced when 0.829 mol of iron reacts completely according to the following reaction at 0oC and 1 atm?
Your spaceship lands on a planet that has a gravitational force whose magnitude is 1/5th of Earth's gravitational force. If you weigh 800 N on Earth
How much stomach acid was neutralized by the 4.3628 g tablet. How much stomach acid would have neutralized by the original 5.6831 tablet
A parallel plate capacitor is composed of two square plates, 8.5 cm on a side, separated by an air gap of 1.00 mm, Find the new capacitance
A hot-air balloon is rising upward with a constant speed of 3.88 m/s. When the balloon is 7.87 m above the ground, How much time elapses before the compass hits the ground
A research submarine has a 10-cm-diameter window that is 8.9cm thick, What is the submarine's maximum safe depth in salt water
A mass of 0.006 kg is attached to a spring that requires a force of 0.01 N to extend it 0.05 meters greater than its natural length, Find maximum velocity of spring when released from rest
The biggest problem I'm running into is how to complete the ICE chart for the columns Change and Revised Equilibrium. I don't know where those numbers come from.
A woman on a bridge 104 m high sees a raft floating at a constant speed on the river below, She drops a stone from rest in an attempt to hit the raft, Find the speed of the raft
A cement block accidentally falls from rest from the ledge of a 82.4 -m-high building, How much time, at most, does the man have to get out of the way
Use the Nernst equation to calculate the Cd2+ concentration when given cell potential of +0.768V and Mn2+ concentration of .500M
A dynamite blast at a quarry launches a rock straight upward, and 2.3 s later it is rising at a rate of 18 m/s, calculate blast speed at launch
A 4.90-g lead bullet traveling at 550 m/s is stopped by a large tree, what is the increase in temperature of the bullet
A boat moves through the water with two forces acting on it. One is a 1800 N forward push by the water on the propeller, What will its velocity be at the end of that time
While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body mass, how fast is the person running
A 0.290-kg block along a horizontal track has a speed of 1.60 m/s, What is the spring's maximum compression if the track is frictionless
A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 5.73 m/s, What is the maximum possible value for d
A proton with kinetic energy of 2.30 × 106 eV is fired perpendicular to the face of a large plate that has a uniform charge density, From what distance should the proton be fired so that it sto