Chemistry..the mole concept?

Question

Calculate the no. of particles (Mg atoms) in 60g of Mg. (Formula mass Mg=24)

Answer 1

conversions:

g Mg --> mol Mg --> atoms Mg

60gMg x (1 mol/24g) x (6.022x10^23 particles/mol) =

1.5055x10^24 particles of Mg

Answer 2

You'd use stoichiometry

60g Mg x  1 mol Mg X  6.02X10^23 molecules  =

                 24.31 g           1 mol

approximately 1.5x 10^24 molecules.