Here's a breakdown of the formula:

* C₁₇H₃₅COO represents the stearate ion, which is the anion of stearic acid. Stearic acid is a long-chain fatty acid with 18 carbon atoms.

* Na represents the sodium cation, which is a positively charged sodium ion.

Sodium stearate is formed by the reaction of stearic acid with sodium hydroxide (NaOH). It's a common ingredient in soaps and detergents, acting as a surfactant to help remove dirt and grease.