Which station model best represents a location that has the greatest chance of precipitation

What’s the percent by mass of carbon in c10h14n2

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.

Iwould appreciate if someone could me.