How does energy travel in a mechanical wave?

in time

in space

in a medium

in a vacuum

Given that the molar mass of nano3  is 85.00  g/mol, what mass of nano3  is needed to make 4.50  l of a 1.50  m nano3solution? use  .6.75 g18.9 g255 g574 g

If two atoms are bonded to a central atom with no lone pairs, how will they be arranged

What type of reaction fuels the processes seen here?