To go from moles to grams, we must divide the given grams by the molar mass of the element. The molar mass of aluminum Al is 26.98g/mol. So the moles of Al will be:
[tex]molAl=givengAl\times\frac{1molAl}{MolarMass,gAl}[/tex][tex]molAl=100gAl\times\frac{1molAl}{26.98gAl}=3.71molAl[/tex]Answer: 100 grams Al are equal to 3.71 moles of Al
