Determine the molar mass of the unknown substance
The density of cyclohexane is 0.779 g/ml. A 0.2080 g sample of an unknown substance was dissolved in the 20.0 ml of cyclohexane. The freezing point depression was 2.1 degrees C. Determine the molar mass of the unknown substance.
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Compute the speed of Halley’s Comet at perihelion. Deduce the answer as the ratio to the orbital speed of Earth.
Explain what would be the effects of the following stresses on the concentration of NH3 once equilibrium is reestablished? Provide a brief explanation for each.
Assume you shoot the arrow straight up at the speed of 60 miles per hour when it leaves bow. How high is arrow two seconds after being shot?
The Fermi energy for copper is around 7.05 eV. Copper consists of a density of 8920 kg/m3 and an atomic mass of 63.5. On average, determine how many electrons does an atom contribute to the conduction band?
A 2.0 liter flask contains 2.0 mol of H2S, 0.40 mol of H2, and 0.80 mol of S2 At a particular temperature. Estimate the equilibrium constant for the reaction
An elevator cab which weighs 27.5 kN moves upward. (i) Determine the tension in the cable when the cab's speed is rising at a rate of 1.58 m/s2.
Provide the structure of the major organic product that results when the 4-methylhexanal is heated in base and undergoes and aldol addition followed by a dehydration.
A proton that consists of a mass m and is moving at 290 m/s in the positive direction experiences a head-on elastic collision with a stationary boron nucleus of mass 10m. Determine the velocities of the proton and the carbon nucleus after the coll
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An old, low quality, but free and interesting documentary: Zimbardo- Stanford Prison Experiment Documentary.