What is the molar mass of lead (II) chloride (#PbCl_2#)?
atomic weight of element
You should have a periodic table available so you can determine the atomic weight of Pb and Cl:
- Pb has an atomic weight of 207.2 g/mol
- Cl has an atomic weight of 35.45 g/mol
From the chemical formula, we have one Pb atom, so the atomic mass would just be 207.2 g/mol
Next, you have two Cl atoms, so you would multiply the atomic mass of Cl by 2 to obtain an atomic weight of 70.90 g/mol
Now you want to add the mass of each atom together to obtain the molar mass of the entire compound: