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If the density of commercial bleach is 1.084 g/mL, how many mL of 0.150 M sodium thiosulfate is required to reach the end point in a titration similar to the one performed in this experiment, if a s
A vertical spring has a stiffness of 2000 N/m. One of its ends is attached to the floor, and the other extends up a distance of 0.4 m when it is unstretched. A block of 3 kg is carefully placed on
how much heat is produced in burning one mole of C2H2 under standard conditions if both reactanta and products are broght to 298K.
A 25.00 g sample of a solid is placed in a graduated cylinder and then the cylinder is filled to the 50.0 mL mark with benzene. The mass of benzene and solid together is 58.80 g. Assuming that the s
A bullet is shot out of a gun with a 61 cm barrel at a speed of 410 m/s into a block of wood. The bullet enters the wood 13 cm. What force does the block exert on the bullet? What is the time it tak
Use the principles of electrochemistry to answer these questions. Why is a salt bridge connecting two compartments of a galvanic cell necessary for the operation of the cell?
Calculate the molar absorptivity of K2Cr2O7 at 455 nm, given that 36.5 mg dissolved in& ; 500.0 mL exhibits 12.0% transmittance at 455 nm in a 2.000 cm cell.
A hawk flies in a horizontal arc of radius 15.0 m at a constant speed 4.25 m/s. It continues to fly along the same horizontal arc, but increases its speed at the rate of 1.10 m/s2. Find the accelera
A box slides down a 30.0 degrees ramp with an acceleration of 1.20 m/s2. Determine the coefficient of kinetic frction between the box and the ramp.
What is the diameter of an Aluminum atom? Hints the mass of 1 mole of Aliminum is 27 g. the desity of Aluminum is 2.7g/mol
Explain the following observations using principles of nuclear chemistry: Gamma rays penetrate farther into the human body than alpha or beta rays.
If a mixture of the two exhibits& ; absorbances of 0.402 at 254nm and 0.432 at 267nm, what is the concentration of each& ; compound?
A 47.3-g golf ball is driven from the tee with an initial speed of 51.6 m/s and rises to a height of 31.6 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest po
A 76 kg diver steps off a 15 m tower and drops from rest straight down into the water. If he comes to rest 5.0 m beneath the surface, determine the average resistance force exerted on him by the wat
A 5.8 kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 4.7 m/s2, find the force exerted by the rope on the bucket.
Pure gold can be made into extremely thin sheets called gold leaf. What is the thickness of the gold leaf in cm? ...in nanometers?
Dan applies a force of 91 N on a heavy box by using a rope held at an angle of 50° with the horizontal. What are the vertical and horizontal components of the 91-N force?
She is attached to a 25m long bungee cord. She jumps off the platform and is in freefall until the she gets to the end of the bungee( 25 m). The bungee begins to stretch and slows her down at a rate
The hypothesis that North America was settled prior to the end of the last glaciation. You analyse the artifact and find that it has a specific activity of 2.2 dpm/g. How old is the artifact?
What is the critical value of area density for the mirror at which the radiation pressure exactly cancels out the gravitational attraction from the sun?
A car travels up a hill at a constant speed of 38.1 km/hr and returns down the hill at a constant speed of 56.6 km/hr. Calculate the average speed of the trip.
How much work is used to raise A to height h? What happens to the kinetic energy of B if its speed is doubled?
Two loudspeakers are placed next to each other and driven by the same source at a frequency of 570 Hz. A listener is in front of the speakers and on on the line separating them, thus creating a con
A compound of molecular weight 280 g/mol a concentration of 15.0 micrograms per ml absorbs 65 percent of radiation at a certain wavelength in a 2 cm cell. Calculate it molar absorptivity at a wavel
Compute the mass of the confined air on the first and the second inner cylinder using the formula m=pv where p is the density of the air