How many lithium atoms are present in 0.01456 of lithium?

Answer 1

I assume you mean;

0.01456 grams lithium (1 mole Li/6.941 grams)(6.022 X 10^23/1 mole Li)

= 1.263 X 10^21 atoms of lithium

Answer 2

To find the number of lithium atoms, you would need to know the molar mass of lithium (6.94 g/mol) and then use the formula:

Number of atoms = (0.01456 g / 6.94 g/mol) * Avogadro's number

Avogadro's number is 6.022 x 10^23 atoms/mol.