# What is the molar mass of lead (II) chloride (#PbCl_2#)?

##### 1 Answer

Aug 11, 2016

#### Explanation:

**atomic weight of element #xx#number of atoms given by subscript #=# molar mass**

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: