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What problem would you encounter if the unknown component was acetaminophen rather than acetanilide or phenacetin, and you extracted the aspirin with 5 % NaOH? Explain, giving equations for any rele
An arrow, starting from rest, leaves the bow with a speed of 24.0 m/s. If the average force exerted on the arrow by the bow were doubled, all else remaining the same, with what speed would the arrow
How many milliliters of concentrated sulfuric acid of specific gravity 1.84 and containing 98% H2SO4 by weight should be used to make 1 liter of one normal (1 N) solution?
Calculate w for the adiabatic expansion of 1 mol of an ideal gas at an initial pressure of 2.25 bar from and initial temp of 475 K to a final temp of 322 K. Write and expression for work done in the
Mars has a mass of 6.42 x 1023 kg and a radius of 3.40 x 106 m. (a) What is the acceleration due to gravity on Mars?
What's the molar solubility (s) of barium iodate in 0.365 M aqueous sodium iodate? Explain why assumptions are fine. If barium iodate were in water, which has a higher molar solubility and why solub
A space traveler weighs 550 N on earth. What will the traveler weigh on another planet whose radius is three times that of earth and whose mass is twice that of earth?
A nearsighted person cannot see objects clearly beyond 25 cm (her far point). If she has no astigmatism and contact lenses are prescribed for her, what a) power and b) type of lens are required to c
A boat has a mass of 6800 kg. Its engines generate a drive force of 4400 N, due west, while the wind exerts a force of 720 N, due east, and the water exerts a resistive force of 1200 N due east. Wha
10 mL aliquots of natural water were pipetted into 50 mL flasks. Exactly 0.0, 0.5. 10.0, 15.0, and 20.0 mL of a standard solution containing 11.1 ppm of Fe were added to each, followed by an excess
An airplane has a mass of 33,500 kg and takes off under the influence of a constant net force of 37,500 N. What is the net force that acts on the plane's 80 kg pilot?
Given that the heat of fusion of water is -6.02 kJ/mol, that the heat capacity of H2O is 75.2 J/mol*K and that the heat capacity of H2O is 37.7 J/mol*K, calculate the heat of fusion of water at -10
The following reaction comes to equilibrium at 800 K. At equilibrium the partial pressure of CO is 10.0 atm and the partial pressure of CO2 is only 2.5 x 10?? atm.
ON a dry day, your body can accumulate static charge from walking across a carpet or from brushing your hair. If your body develops a charge of -15 microcoulombs, how many mass electrons has it acq
Naturally occurring iodine has an atomic mass of 126.9045. A 12.3849-{\rm g} sample of iodine is accidentally contaminated with 1.00070 {\rm g} of ^{129}{\rm I}, a synthetic radioisotope of iodine
You are conducting an experiment inside an elevator that can move in a vertical shaft. A load is hung vertically from the ceiling on a string, and is stationary with respect to you.
What is the concentration of dissolved sulfate in the water once equilibrium is achieved? If additional 10 grams is added, what would be the new equilibrium concentration of calcium sulfate?
A solution prepared by dissolving 17.75 grams of sulfuric acid,(98.10g/mol), in enough water to make 100 ml of solution. if the density of the solution is 1.1094g.ml what is the molality and molari
Consider a spherical conducting shell where the conductor has a net charge Q on it with no charges in the cavity. Does the voltage vary within the cavity from place to place? Explain why or why not?
A sinusoidal wave is traveling on a string with a speed of 40 cm/s. The displacement of the particles of the string at x = 10 cm is found to vary with time according to the equationWhat is the frequ
A solution of sodium bicarbonate is prepared by adding 45 g of sodium bicarbonate to a 1.00L volumetric flask and adding distilled water until it reaches the 1 L mark.
(a) The total amount of charge entering a wire at time t is Q = (20 C) (1-exp(-t / 2sec)), where 0<t<10 is in seconds. Graph Q(t), find an expression for the current I(t), graph I(t) and find
A .21 m^3 drum contains 100L of a mixture of several degreasing solvents in water. The concentration of trichloroethylene in the headspace (gas phase) above the water was measured to be .00301 atm.
A square plate of copper with .5m sides has no net charge and is placed in a region of uniform electric field of 80.0 kN/C directed perpendicularly to the plate. Find (a) the charge density of each
A projectile is launched from ground level with an initial speed of 54.2 m/s. Find the launch angle (the angle the initial velocity vector is above the horizontal) such that the maximum height of th