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What should be the concentration of the potassium thiocyanate solution in order that each mL of solution correspond to exactly 1 mg of arsenic present?
At local coffee shop, you purchase a cup of coffee,but at 98.4 degree centigrade, it is too hot to drink.You add 23.0g of ice that is at -2.2degree centigrade, to 248mL of coffee.
A 0.22 m(micro)F capacitor by a 1.5-V battery. After being charged, the capacitor is connected to a small electric motor. Assuming 100% efficiency. 1) what initial voltage must the capacitor have if
What potential difference is required to reduce the initial speed of the proton by a factor of two?
A train is traveling up a 4.1 degrees incline at a speed of 2.45 m/s when the last car breaks free and begins to coast without friction. How far did the last car travel before momentarily coming to
A 0.22 m(micro)F capacitor by a 1.5-V battery. After being charged, the capacitor is connected to a small electric motor. Assuming 100% efficiency. A) to what height can the motor lift a 5.0-g mass?
Synthesize (3S,4R)-3,4-dibromo-1-cyclohexylpentane (and its enantiomer, since a racemic mixture will be formed) from ethyne, 1-chloro-2-cyclohexylethane, and bromomethane and any other reagents as
From the chart of the nuclides, for each of the two decay transitions what are the parent and daughter nuclides, the atomic mass numbers and atomic numbers, the modes of decay and energies, and the
The aldol reaction is catalyzed by acid as well as by base. What is the reactive nucleophile in the acid-catalyzed aldol reaction? Propose a mechanism.
A 9.45 kg projectile is fired vertically upward. Air drag decreases the mechanical energy of the projectile-Earth system by 69.0 kJ during the projectile's ascent. How much higher would the projecti
A 0.22 m(micro)F capacitor by a 1.5-V battery. After being charged, the capacitor is connected to a small electric motor. Assuming 100% efficiency.
Dissolved silica in river water can be determined by the formation of a green-yellow silicmolybdate complex and the comparison of its absorbance against a reference standard.
Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and that the alcohol vaporizes at 25 degrees Celsius. 1.04 gram of rubbing alcohol on 53 gram alu
A ball is kicked at an angle of 30 degrees with a velocity of 10 m/s. What is its maximum height? What is its velocity at maximum height? What is its velocity vector where the ball lands? Plot: x (t
How much radioactive material 99mTc would you need to ship from a supplier of radio pharmaceuticals if you need a dose of 4mCi for a patient at 3:00pm and it takes five (5) hours to get the material
A child is twirling a 0.0132 kg ball on a string in a horizontal circle whose radius is 0.106 m. The ball travels once around the circle in 0.490 s. (a) Determine the centripetal force acting on the
A freshman studying medicine at an Ivy League College is a part of his class crew team and exercises regularly. After a particularly strenuous exercise session, he experiences severe cramps in his t
A 2.65 g bullet moving at 896 m/s penetrates a tree to a depth of 4.55 cm. Use energy considerations to find the average frictional force that stops the bullet.
At one instant the outer wall moves at a speed of 3.9 m/s, and an 83 kg person feels a 535 N force pressing against his back. What is the radius of the chamber?
A standard solution prepared in the same fashion, containing 5.00 mL of 5.00 x 10-4 M Fe(ClO4)3 and the reagents (no sample) had an absorbance of 0.284.
A Boy standing on the roof throws one ball upward and another one downward with same initial speed. how do the final speeds of the two balls at the moment when they hit the ground? Explain.
Two billiard balls of equal mass undergo a perfectly elastic head-on collision. If the speed of ball 1 was initially 3.00 m/s, and that of ball 2 was 4.00 m/s in the opposite direction, what will b
If 1.50 m^3 of water at 0 degrees Celsius is frozen and cooled to -15 degrees Celsius by being in contact with a great deal of ice at -15 degrees Celsius, what would be the total change in entropy
A 2100 kg truck traveling north at 41 km/h turns east and accelerates to 51 km/h. (a) What is the change in the truck's kinetic energy? What are the (b) magnitude and (c) direction of the change in
Two forces act on a moving object that has a mass of 27 kg. One has a magnitude of 12 N and points due south, while the other has a magnitude of 17 N and points due west. What is the acceleration (m