5.2g of lithium dichromate. how many lithium atoms ?

Question

5.2g of lithium dichromate. how many lithium atoms ?

Answer 1

Lithium dichromate is Li2Cr2O7

Molar mass = 229.87 g/mol

5.2 g x 1 mol/229.87 g x 6.02x10²³ formula units/mol x 2 Li atoms/formula unit = 2.7x10²² Li atoms