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Three equal point charges, each with charge 1.10 , are placed at the vertices of an equilateral triangle whose sides are of length 0.200 . What is the electric potential energy of the system? (Take
What is the molar concentration of AgNO3 in a solution if titration of 25.00 ml of the solution with 0.300M NaCL requires 37.05ml of the NaCL solution to reach the end point?
The proper length of one spaceship is three times that of another. The two spaceships are traveling in the same direction and, while both are passing overhead, an Earth observer measures the two sp
A car starts from rest on a curve with a radius of 190 m and accelerates at 0.400 m/s^2. How many revolutions will the car have gone through when the magnitude of its total acceleration is 2.00 m/s^
At 900 degree C, titanium tetrachloride vapour react with molten magnesium metal to form solid titanium metal and molten magnesium chloride. a). Write a balance equation for this reaction. b). what
A 4 kg object is attached to a spring with a spring constant of 10 N/m. The object is displaced 5 cm from the equilibrium position and let go. What is the frequency of the vibration?
A car travels due east with a speed of 50.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle
What is the volume of propylene glycol, in gallons, needed to achieve the same antifreeze protection as 1.00 gallon of ethylene glycol.
If a pOH of 8.3 produces the best results for coagulation settling of a water, how much lime should be added to a water with an alkalinity of 255 mg/L as CaCO3 and pH of 7.5 that will be dosed with
An airplane is flying with a ground speed of 125 km/hr on a true course of 245 degrees. If the plane has an air speed of 145 km/hr and is on a heading of 20 degrees, what is the wind speed and direc
Calculate the molarity of the hydroxide ions in a solution that has been prepared by dissolving 70.3 g of barium hydroxide (Ba(OH)2) in water and diluting the solution to a final volume of 4.00 L.
Some gliders are launched from the ground by means of a winch, which rapidly reels in a towing cable attached to the glider. What average power must the winch supply in order to accelerate a 174-kg
A 1.5-kg specimen of a 88wt% Pb-12wt% Sn alloy is heated to 220°C; at this temperature it is entirely an α-phase solid solution. To what temperature must the specimen be heated?
You weigh out 50mg of benzoic acid and dissolve it in 1mL of diethyl ether. This is then extracted with 1mL of water. The ether layer is removed, dried with sodium sulfate and the ether evaporated y
You determine the temperature mixed solutions to be 45 degrees Celsius. What is the heat capacity of the calorimeter?
What volumetric airflow rate (Qa) is required to maintain a G value of 500s-1 in a basin that is 2.75 m deep and provides a liquid detention time of 5 min? Perform the exercise for water temperature
A gas is compressed under isobaric conditions, and its volume changes from 9.0 10-3 to 2.0 10-3 m3. The pressure of the gas is 1.0 105 Pa.
A village maintains a large tank with an open top, containing water for emergencies. The water can drain from the tank through a hose of diameter 6.65 cm. The hose ends with a nozzle of diameter 2.5
Sodium atoms emit light with a wavelength of 330 nm when an electron moves from a 4 p orbital to a 3 s orbital. What is the energy difference between the orbitals in kilojoules per mole?
In a calibration experiment, a 0.98 millimole sample of Na2CO3 gave 0.81 millimoles of CO2 gas. If a 0.342 g of pure Na2CO3 was reacted with excess acid, what volume of gas will be measured on this
When one gallon of gasoline is burned in a car engine, 1.22 108 J of internal energy is released. Suppose that 1.05 108 J of this energy flows directly into the surroundings (engine block and exhaus
Determine if the following reactions will form a precipitate when solutions of the reactants are mixed. If a precipitate is formed when the reactants are mixed, write the balanced formula unit.
A 200 weather rocket is loaded with 100 kg of fuel and fired straight up. It accelerates upward at 30 m/s^2 for 33 s, then runs out of fuel. Ignore any air resistance effects. What is the rocket's m
Methane gas, CH4, effuses through a barrier at a rate of 0.568 mL/minute. If an unknown gas effuses through the same barrier at a rate of 0.343 mL/minute, what is the molar mass of the gas?