1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Mass-Volume Question

  1. Oct 4, 2008 #1
    A uranium alloy has density of 18.75 g/cm3. Find the volume if occupied
    by a critical mass of 49 kg of this alloy? The critical mass itself can be decreased to 16
    kg if the alloy is surrounded by a layer of natural uranium ( neutron reflector). What is the volume of the smaller mass?

    I am sorry but I have no idea how to do this question, I just don't get how to start , like should i use moles or possibly nuclear equations. No idea

    Lastly, more importantly any good sites to teach how to draw Lewis structure
     
  2. jcsd
  3. Oct 4, 2008 #2

    Borek

    User Avatar

    Staff: Mentor

    You have mass, you have density, just use these number to calculate volume. That's all.
     
  4. Oct 4, 2008 #3
    Thanks but then what is all the decreased mass and all those

    And they are asking the 'smaller' mass
     
  5. Oct 4, 2008 #4

    Borek

    User Avatar

    Staff: Mentor

    You have two masses given - 49 kg and 16 kg. One is larger, one is smaller. There is nothing more to the question, everything else is just to make the question more interesting (or more confusing if you like).
     
  6. Oct 4, 2008 #5

    So the answer is 16000 g /18.75g

    And what will the unit for volume be
     
  7. Oct 5, 2008 #6

    Borek

    User Avatar

    Staff: Mentor

    [tex]\frac {16000 g} { 18.75 \frac {g} {mL}} [/tex]

    Units follow from that.
     
  8. Oct 7, 2008 #7

    Thanks for answering that but I had one more question as in my first post

    Lastly, more importantly any good sites to teach how to draw Lewis structure

    I know that there are many sites from google but i somehow dont find it easy to understand thereby any other good sites
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Mass-Volume Question
  1. Mass to Volume Problem (Replies: 1)

  2. Find mass and volume (Replies: 1)

Loading...