How many formula units that are in 1.75 mole of
NaCl

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