Book found here on open stax https://cnx.org/contents/HmIX@6/Lewis-Symbols-and-Structures Sectoions 4.4 and 4.

Book found here on open stax :uvpEHmIX@6/Lewis-Symbols-and-Structures

Sectoions 4.4 and 4.5

Write the Lewis structure and chemical formula of the compound with a molar mass of about 70 g/mol that contains 19.7% nitrogen and 80.3% fluorine by mass, and determine the formal charge of the atoms in this compound.