This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A laboratory vacuum pump can reduce the pressure in a chamber to 1.0 10-7 Pa. If the volume of the ... (Read 43 times)

joesmith1212

  • Hero Member
  • *****
  • Posts: 549
on: Jul 29, 2018
A laboratory vacuum pump can reduce the pressure in a chamber to 1.0  10-7 Pa. If the volume of the chamber is 0.500 m3 and the temperature is 27C, how many molecules are left inside the chamber? (NA = 6.022  1023 molecules/mol, R = 8.
 
  31 J/mol  K) A) 1.2  1013
  B) 2.4  1013
  C) 1.2  1012
  D) 2.4  1012
  E) 1.2  1014

Question 2

An x-ray tube accelerates electrons through a potential difference of 50.0 kV. If an electron in the beam suddenly give up its energy in a collision,
 
  what is the shortest wavelength x-ray it could produce? (c = 3.00  108 m/s, h = 6.626  10-34 J  s, e = 1.60  10-19 C)


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

welcom1000

  • Sr. Member
  • ****
  • Posts: 298
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

2.48  10-11 m


joesmith1212

  • Member
  • Posts: 549
Reply 2 on: Jul 29, 2018
Excellent

meow1234

  • Member
  • Posts: 333
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

Did you know?

Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

Did you know?

In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Changes in cell shape due to alterations in intracellular fluid volume. Changes in cell shape due to alterations in intracellular fluid volume.
Focusing Jets by Pressure Focusing Jets by Pressure
Measuring Systolic Blood Pressure Using the Palpatory Method Measuring Systolic Blood Pressure Using the Palpatory Method
A direct injection diesel engine injects the fuel directly into the combustion chamber. Many ... A direct injection diesel engine injects the fuel directly into the combustion chamber. Many ...
Direct pressure to suboccipital muscles. Fingers press up into the cervical muscle attachments along ... Direct pressure to suboccipital muscles. Fingers press up into the cervical muscle attachments along ...
Apply direct pressure to points on low back. Press into paraspinal muscles from the side. Move spot ... Apply direct pressure to points on low back. Press into paraspinal muscles from the side. Move spot ...
Video: Spermatogenesis Animation

For a complete list of videos, visit our video library