What happens to the mass of a substance during a physical change?

Sodium nitrite (nano2) reacted with 2−iodooctane to give a mixture of two constitutionally isomeric compounds of molecular formula c8h17no2 in a combined yield of 88%. draw reasonable structures for these two isomers. click the "draw structure" button to launch the drawing utility. place the two compounds in the appropriate boxes below.

What is the vapor pressure of a solution with a benzene to octane?

Which process describes vaporization that takes place below the surface of a liquid? condensation melting boiling evaporation