1. Understanding the Formula

* Trimellitic acid has the chemical formula C6H3(COOH)3. This means each molecule contains:

* 6 carbon atoms (C)

* 3 hydrogen atoms (H)

* 3 carboxyl groups (COOH)

2. Moles to Molecules

* Avogadro's number: There are 6.022 x 10^23 molecules in one mole of any substance.

* Calculating molecules: To find the number of molecules in 0.358 mol of trimellitic acid:

* 0.358 mol * (6.022 x 10^23 molecules/mol) = 2.15 x 10^23 molecules

3. Molecules to Atoms

* Atoms per molecule: One molecule of trimellitic acid has 6 + 3 + 3(2) = 15 atoms.

* Total atoms: To find the total number of atoms:

* 2.15 x 10^23 molecules * 15 atoms/molecule = 3.23 x 10^24 atoms

Therefore, in 0.358 mol of trimellitic acid, there are:

* 2.15 x 10^23 molecules

* 3.23 x 10^24 atoms