how much does dark matter weigh? and if so how many joules would it take to lift it 10 metres high?

Question: how much does dark matter weigh? and if so how many joules would it take to lift it 10 metres high?
- Keywords:
  dark matter,
  energy,
  joules
Asked by YILDIZ to Anthea, Sean on 12 Nov 2014.
- Anthea Lacchia answered on 12 Nov 2014:
  
  I’m no physicist, but as far as I could find out, dark matter doesn’t technically weigh anything. We know SO little about dark matter! We don’t really know what it is and what it’s made of!
  Here’s a good article on dark matter and dark energy:
  http://science.nasa.gov/astrophysics/focus-areas/what-is-dark-energy/
  Hope this helps!

Question: how much does dark matter weigh? and if so how many joules would it take to lift it 10 metres high?