How many li are in 2.5 moles of li

15.06 * 10²³ atoms of Li

Explanation:

Given dа ta:

Number of moles of Li = 2.5 mol

Number of toms of Li = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms, ions 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.

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

For 2.5 mol of Li:

1 mole of lithium = 6.022 * 10²³ atoms of Li

2.5 mol * 6.022 * 10²³ atoms of Li / 1 mol

15.06 * 10²³ atoms of Li