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An electron (mass m = 9.11 multiplied by 10-31 kg) is accelerated in the uniform field E (E = 1.90 multiplied by 104 N/C) between two parallel charged plates. The separation of the plates is 1.30 c
A chemist prepared a 0.244 M solution of fructose at250C. At equilibrium it was found that its concentration had decreased to 0.163 M. Calculate the equilibrium constant for the reaction.
A quantity of 0.20 mole of carbon dioxide was heated to acertain temperature with an excess of graphite in a close container until the following equilibrium was reached.
When 1.25 moles of Br2 are put in a 0.770-L flask,2.00 percent of the Br2 undergoes dissociation.Calculate the equilibrium constant Kc for the reaction.
In an experiment for measuring the speed of sound, a gun was shot 715m away from the observer. It was heard 2.13seconds after the flash was seen. What was the speed of the sound in the air at the ti
X-ray diffraction from crystals provides one of the most accurate ways of determining the Avogadro's number. Silver crystallizes in a face-centered cubic lattice with all atoms at the lattice points
What is the expression for the work done by non-conservative forces on the rock? (Use any variable stated above along with the following as necessary: g)
How many liters of Cl2 gas at STP are produced by the reaction of 30.0 mL of a 12.0 M solution of HCl? (That is,there are 12.0 mol HCl per liter of solution.) There is an excessof KMnO4. The re
Two ice skaters are skating hand in hand along a frozen, horizonal surface. The center of mass of both skaters runs immediately between them. The two skaters have respective masses of 60 kg.and 100
Using the table of standard enthalpies, calculate the enthalpy of formation of methanol,CH3OH.Use the following chemical reaction
What was the horizontal component of the velocity of the jumping skateboarder just before he landed on the skateboard?
The cars lock bumpers and then slide away together after the collision. What are the magnitude and direction of their final velocity?
An aqueous solution at 25C has a H+ concentration of 4.0 x10-2 molar. What is the OH- concentration in the same solution in moles per liter?
Consider a tennis player who hits a serve at 140 mi/h (63 m/s). Estimate the average force exerted by the racket on the ball (m=57g)?
Find the minimum speed at which a car can travel around this curve without skidding if the coefficient of static friction between the road and the tires is 0.7. Answer in units of m/s.
Assume you could titrate to the third equivalence pt ofH3PO4. What would be the relationship of Volume at equivalence pt 3 to V equiv. 2 to V equiv. 1?
A solution with 0.10M of sodium propipnate, and another solution contains 0.12M hydrofluric acid and 0.10M sodium floride.Which of these solution is a buffer solution? State the reason PLZ?
If the ball has a speed of 3.0 m/s just before striking the floor and a speed of 2.5 m/s just after bouncing, what is the average force of the floor on the ball? Assume the ball is in contact with t
A projectile is launched horizontally. It travels 2.050m horizontally and 0.450m vertically in the Earth's gravitational field before it hits the ground. a. What is the initial velocity of the proje
A jogger accelerates from rest to 2.7 m/s in 2.7 s. A car accelerates from 36.0 to 44.0 m/s also in 2.7 s. the acceleration (magnitude only) of the jogger is 1 m/s^2.
How long in hours, must a current of 2.4 amperes flow in order to deposit 9.50 grams of copper, Cu (s) from a solution of Cu(NO3)2? the molar mass of copper is 63.5 g/mol.
What phase difference between two otherwise identical traveling waves, moving in the same direction along a stretched string, will result in the combined wave having an amplitude 0.72 times that of
If 876 coulombs of electricity is used to reduce Cr3+ to Cr (s), how many grams of chromium will be deposited at the cathode?
If these two runners had run in the same race, each running the entire race at the average speed that earned him a place in the record books, el-Guerrouj would have won. By how many meters?
A ball rolling along a floor doesn't continue rolling indefinitely. Is it because it is seeking a place of rest or because some force is acting upon it? If the latter, identify the force.