What is the molecular mass of Au

What are the first three quantum numbers for the electrons located in subshell 2s?

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.

Identify the lewis base in this balanced equation: fe3+ h2o fe(h2o)63+