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A spherical balloon has a diameter of 50.0 cm, absolute pressure inside is 1.25atm and the temperature is 22 degree Celsius. Assume that all the gas in N2 is of molar mass 28.0 g/mol. (a) find the
An unknown concentration of a solution gave a Percent Transmittance of 68% under Spectronic 20 passing through 8mm path length. Calculate its concentration given that the molar absorbtivity of the s
What speed would an astronaut need to give a lunar golfball in order to put the ball in orbit aound the Moon?
Four +7 µC point charges are at the corners of a square of side 1 m. Find the potential at the center of the square (relative to zero potential at infinity) for each of the following condition
A 15.0 kg turntable with a radius of 25 cm is covered with a uniform layer of dry ice that has a mass of 9.0 kg. The angular speed of the turntable and dry ice is initially .75 rad/s, but it increas
A buffer system, that is important for humans, is formed between carbonic acid and the bicarbonate ion. Calculate the molar ratio of bicarbonate ion to carbonic acid present at pH 7.56. (Ka = 4
A series RC circuit has a time constant of 0.930 s. The battery has an emf of 48.0 V, and the maximum current in the circuit is 490 mA. (a) What is the value of the capacitance?
When determining pH of atitration (weak acid strong base) using equilibrium constants, what purpose does hydrolysis serve and how is the pH determined usingit?
Suppose that you wish to fabricate a uniform wire out of 0.800 g of copper. If the wire is to have a resistance R = 0.300 , and if all of the copper is to be used. (a) What will be the length of the
A series RC circuit has a time constant of 0.880 s. The battery has an emf of 51.0 V, and the maximum current in the circuit is 500 mA. (a) What is the value of the capacitance?
Determine the average mass of an ice cube produced by an ordinary refrigerator standard ice cube maker.Statethe type and model of refrigerator.Provide any necessary detailed about the ice cube maker
If the loop of wire carries a current of 10 amperes, what is the magnitude and direction of the net magnetic force on the loop? (Ignore the forces on the straight connecting wires, and the fact that
A 1.6-m-tall woman stands 2.0 m in front of a convex funhouse mirror with a focal length of 2/3 m . Use ray tracing to determine the location of her image. Use ray tracing to determine height of her
A solution is prepared by dissolving 0.17mol of acetic acid and 0.17 mol of ammonium chloride in enoughwater to make a 1.0 L of solution. Find the concentration of ammonia in the solution
Two very small spheres are initially neutral and separated by a distance of 0.56 m. Suppose that 6.9 x 1013 electrons are removed from one sphere and placed on the other. What is the magnitude of th
Calculate pH at the equivalence point in a titration between 10.0 mL acetic acid (0.1000M) and sodium hydroxide (0.1000M)
This field is created by two parallel plates separated by 12 with a potential difference of 250 across them. a) What is the speed of the protons as they enter the electric field?
You need to prepare 600 mL of a 2.00 M NaOH solution from a10.0 M NaOH solution. What is the volume of the NaOH solution do you use?
Would the magnetic field produced by the upper and lower wires of the loop be more or less significant than that produced by the sides of the wire loop??
From above, sand is dropped straight down onto this rotating disk, so that a thin uniform ring of sand is formed at a distance 0.30 m from the axis. The sand in the ring has a mass of 0.34 kg. After
(a) What is the height of the hill? (b) Released from rest at the same height, a can of frozen juice rolls to the bottom of the same hill. What is the translational speed of the frozen juice can whe
Suppose equal volumes of iron and water interact thermally. Which will change temperature more? If they are initially 30 Celsius degrees apart in temperature, how much will the temperature of each c
Hydrogen sulfide can be prepared in the laboratory be reacting iron (II) sulphide with dilute hydrochloric acid: 80.0 g. of FeS is reacted with 250.0 ml of 0.80 M HCl. How many liters of H2S can be
Calulate the molar solubility of a saturated solution of Ag2SO4 if the Ksp =1.2 x10-5. Write the equilibrium equation and equilibrium expression.
If the hose is pulled so that the tension in it remains a constant 25.0 N, how long does it take to completely unwind the hose from the reel? Neglect the mass of the hose, and assume that the hose u