Explain what impurities are present and why
Historically, the solid residue that is left after the methylene chloride solution is evaporated has a lower melting point that its literature value, due to impurities. Explain what impurities are present and why?
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A 1.0m length of straight wire carries a current of 21 A in a uniform magnetic field of 60 mT whose direction is at an angle of 39 degrees from the direction of the current. Find the force on the wire.
What is the mass flow rate in kg/s through the turbine? The turbine and electric generator as a combined system operate with an efficiency of 85%.
A rocket-powered hockey puck has a thrust of 2.70 N and a total mass of 2.30 kg. It is released from rest on a frictionless table, 2.50 m from the edge of a 2.10 m drop. The front of the rocket is pointed directly toward the edge. How far does the
The running engine of an automobile produces carbon monoxide at the rate og 188 g CO per hour.A car is left idling at 293.15 K in a garage that is 6 m long, 4m wide and 2.2m high How long would it take to build up a lethal concentration of CO of 1
In a student experiment, the empirical formula of a copper halide was found by adding aluminum metal to an aqueous solution of the halide, displacing copper metal.
Determine the amount of heat transferred to the air, in kJ, while increasing the temperature to 1200 K. Assume air has the constant specific heats evaluated at 300 K.
Calculate the maximum nonexpansion work that can be gained from the combustion of benzene (l) and of H2 (g) on a per gram and a per mole basis under standard conditions.
What amount of solid sodium acetate is needed to prepare a buffer at pH 5.2 from 500 mL of 0.10 M acetic acid? The pKa of acetic acid is 4.75.
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