Chemistry

posted by .

A tubular fluorescent lamp in a fully evacuated supply compartment on the international space station was originally filled with a small amount of mercury vapour. When the lamp began to flicker the astronauts complained there was a tiny hole in the tube. They measured that the pressure inside the tube dropped from 2.31torr to 2.09torr after 24 hours. The volume of the tube is 1.39L. The temperature was at a constant of 82K over the 24h period. Please calculate the diameter of the hole in millimeters (assume it is round).

Please help...after several attempts I still can't get the right answer.

First I got the moles using the first pressure, and the second mole using the second pressure. Then I subtracted the two to get the final mole. To get the number of molecules I did avogadro's number multiplied with the moles. I then used the Z wall formula. Please help step by step! thanks!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics: Astronauts and space

    When out in space in International Space Station (ISS), Astronauts experience weightlessness. The ISS’s orbit is 354 km (that is 3.54 x 105 m) above the surface of the earth.The distance separating the center of the earth from the …
  2. Science

    video clips from the International Space Station, the astronauts are seen floating around as if there is no force of gravity holding them to the floor. The truth is that the space station is orbiting Earth at a height of only about …
  3. Chemistry

    Describe the spectrum of the light from a fluorescent lamp and from an incandescent (tungsten filament) lamp, and try to explain what you observe. So fluorescent lamps use electricity to excite mercury vapour, and the excited atoms …
  4. ipc

    investigate and compare economic and environmental impacts of incandescent light bulbs versus the various fluorescent lamps, solar lamp, and oil burning lamp or candles.
  5. physics

    It is desired to move a small, 50 kg cat in outer space by strapping a lamp, which emits 100 W of blue light to it. If the cat is free in space, and the wavelength of blue light is 470 nm, what would be the acceleration of the cat?
  6. Chemistry

    Based on the spectrum of the fluorescent lamp, what is the main difference between the radiation emitted by a heated solid (filament) and the radiation emitted by an atomic gas (mercury gas in the fluorescent tube)?
  7. Physics

    Futurists project large space stations which would rotate so as to use centripetal acceleration to simulate gravity. The outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration …
  8. Physics

    A red flower seen in the light of mercury vapour lamp through a green filter will appear?
  9. science

    An electric lamp rated at 48w,12-v supply. Calculate the current flowing in the lamp and the resistance
  10. English

    1. The fluorescent lamp is over the desk. 2. An ant is beneath the table. 3. The cat is under the table. 4. A book is on the table. ----------------------- Does #1 mean that the fluorescent lamp is right above the table?

More Similar Questions