If a sample of magnesium has a mass of 60.0 g, how many moles of magnesium does the sample contain

the moles of magnesium does the sample contain is 2.469 moles

calculation

moles of Mg = mass of Mg / molar mass of Mg

mass of Mg = 60.0 g

From periodic table, the molar mass of Mg = 24.3 g/mol

The moles of mg is therefore = 60.0 g / 24.3 g/mol = 2.469 moles