Which structure is the most stable (lowest energy resonance contributor?

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 substance has a mass of 9.5g and volume of 2.1cm^3

How do dying stars contribute to the formation of planets