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A small metal ball with a mass of 4.0 g and a charge of 5.0 mC in located at a distance of 0.70 m above the ground in an electric field of 12 N/C directed to the east. The ball is then released from
A crane lifts a ball weighing 2 x 10^4 N by 40 m in 2 seconds. A) How much work against the force of gravity does the crane do on the ball?
Consider the reaction: CO2(g) + H2(g) -> CO(g) + H2O(g), for which Kc= 0.64 at 900K. If the initialconcentrations of CO2 and H2 are each 0.100 M, what will be the equilibrium concentrat
A spring with k = 51 N/m hangs vertically next to a ruler. The end of the spring is next to the 15 cm mark on the ruler. If a 2.9 kg mass is now attached to the end of the spring, where will the end
A drop of water has a volume of .05 mL. If the density of water is 1.0g/mL, how many molecules of water are present in the drop? The gram molecular weight is 18.016.
A projectile of mass 0.879 kg is shot straight up with an initial speed of 27.4 m/s. (a) How high would it go if there were no air resistance? (b) If the projectile rises to a maximum height of only
A 51.6-g golf ball is driven from the tee with an initial speed of 43.9 m/s and rises to a height of 25.4 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest po
A solution of 0.2532 g of sulfamic acid and 100ml H2Oand a solution of 0.30g sodium nitrate acid in 50ml H2Owere used to produce nitrogen gas. 10ml of the sulfamic acid solution was mixed with 5ml of
At the top of the loop, the rider is upside-down and moving, and the sensor reads 320 N. What is the speed of the rider at the top of the loop?
Two balls, of masses mA = 40 g and mB = 64 g are suspended. The lighter ball is pulled away to a 60 degree angle ( in the negative x direction) with the vertical and released. The height from which
The purity of a sample containing zinc and weighing 0.198 g is determined by measuring the amount of hydrogen formed when thesample reacts with an excess of hydrochloric acid.
An automobile traveling at 20 m/s is approaching a traffic signal. when the driver is 150 m from the intersection, the light changes from green to yellow. Since the light will remain yellow for 5 s,
50 mL of HNO3 requires 35.50 mL ofBa(OH)2 0.150 M to neutralize it. Determine the molarity of the acid solution. Write the adjusted chemical equation.
A soccer ball is kicked from the ground with an initial speed of 19.9 m/s at an upward angle of 48.1°. A player 50.8 m away in the direction of the kick starts running to meet the ball at that i
An enzyme catalyzed reaction is carried out in a 50 mLsolution containing 0.1 M TRIS buffer. The pH of the reactionmixture at the start was 8.0. As a result of the reaction, 00002mole of H+ were pro
What are (a) the magnitude of the cat's centripetal acceleration and (b) the magnitude of the cat's average acceleration during the time interval t2 - t1, which is less than a period of the motion?
is collected over waterat 27 C in a 2.00 L vessel at a total pressure of 760 torr. (The vapor pressure of H2O at 27 C is 26.0 torr.) How manymoles of KClO3 were consumed in the reaction?
A water desalination plant is set up near a salt marsh containing water that is 0.10 M NaCl. Calculate the minimum pressure that must be applied at 20.C to purify the water by reserve osmosis.
Anthraquinone contains only carbon, hydrogen, and oxygen and has an empirical formula of C2H4O.The freezing point of camphor is lowered by 22.3C when 1.32g anthraquinone is disolved in 11.4g camphor
A 2.00 g sample of a large biomolecule was dissoled in 15.0 gof carbon tetrachloride. The boiling point of thissolution was determined be 77.85C .
Two horizontal forces are being applied to a 6 kg object. One force has a magnitude of 10 N and is directed toward the north. the second force has a magnitude of 15 N and is directed toward the nor
The diameter of a certain atomic nucleus is 1.70x 10-5pm and its mass is 5.80 x 10-25 g. What is the densityof the nucleus in grams per centimeter cubed ?
The reaction A+2B -> products has the rate law, rate = k[A][B]^3. If the concentration of B is dobled while that of A is unchanged, by what factor will the rate of reaction increase?
When 100.0 mL water at an unknown temperature is mixed with 50.0mL water at 10 degrees celsius, the final temperature is 30 degrees celsius.
It takes 42 min for the concentration of a reactant in a first order reaction to drop from 0.45 M to 0.32 M at 25 degrees C. How long will it take for the reaction to be 90% complete?