marthy

Popular questions and responses by marthy
  1. General Chemistry

    At a certain temperature, the equilibrium constant for the following chemical equation is 2.90. At this temperature, calculate the number of moles of NO2(g) that must be added to 2.53 mol of SO2(g) in order to form 1.10 mol of SO3(g) at equilibrium.

    asked on March 8, 2013
  2. Physics

    The tube of a mercury thermometer has an inside diameter of 0.130 mm. The bulb has a volume of 0.270 cm^3. How far will the thread of mercury move when the temperature changes from 13.5 ∘C to 32.5 ∘C? Take into account expansion of the Pyrex glass.

    asked on January 21, 2018
  3. Physics

    A 68.6 kg solid aluminum cylindrical wheel of radius 0.45 m is rotating about its axle in frictionless bearings with angular velocity ω = 45.5 rad/s. If its temperature is then raised from 21.0 ∘C to 88.0 ∘C, what is the fractional change in ω?

    asked on January 21, 2018