Answer:
109.3 × 10⁵ mol
Step-by-step explanation:
Given data:
Number of moles of phosphoric acid = ?
Number of formula units = 658 × 10²⁸
Solution:
The given problem will solve by using Avogadro number.
The number 6.022 × 10²³ is called Avogadro number.
1 mole contain 6.022 × 10²³ formula units,
658 × 10²⁸ formula units × 1 mol / 6.022 × 10²³ formula units
109.3 × 10⁵ mol