If you compare an amount of one element equal to its atomic mass in grams to an amount of another element equal to its atomic mass in grams, what comparison can you make about the number of atoms in each sample? Explain.

0.0041 mol

Explanation:

Given data:

Number of formula units = 2.45 × 10²¹ formula units

Number of moles = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions ,formula units and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ formula units

2.45 × 10²¹ formula units × 1 mol / 6.022 × 10²³ formula units

0.41 × 10⁻² mol

0.0041 mol