Calculate the molar mass

FeCl3

Fe2 (SO4) 3

PbO

PbO2

Pb3O4

To find molar mass: look for each element on the table and find their atomic masses. Then add each atomic mass to find the molar mass. If there is a subscript then that means that there is 3 of that number. For atomic mass round to the nearest hundredths

FeCl3 = 162.2

Fe2 (SO4) 3 = 354.88

PbO=223.2

PbO2 = 239.2

Pb3O4=685.6