Answer:
10.54 ×10²³ formula units
Explanation:
Given data:
Moles of NaCl = 1.75 mol
Number of formula units = ?
Solution:
1 mole = 6.022×10²³ formula units
1.75 mol × 6.022×10²³ formula units/ 1mol
10.54 ×10²³ formula units
The number 6.022 × 10²³ is called Avogadro number. It is the number of atoms , ions ,molecules or formula units in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water
1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen
