1. Determine the number of oxygen atoms per formula unit:
* The chemical formula Na₃PO₄ tells us there are 4 oxygen atoms in each formula unit of sodium phosphate.
2. Calculate the number of formula units:
* Use Avogadro's number (6.022 x 10²³ formula units/mole) to convert moles of sodium phosphate to formula units:
2.35 moles Na₃PO₄ * (6.022 x 10²³ formula units/mole) = 1.415 x 10²⁴ formula units
3. Calculate the total number of oxygen atoms:
* Multiply the number of formula units by the number of oxygen atoms per formula unit:
1.415 x 10²⁴ formula units * 4 oxygen atoms/formula unit = 5.66 x 10²⁴ oxygen atoms
Therefore, there are approximately 5.66 x 10²⁴ oxygen atoms in 2.35 moles of sodium phosphate.
