Answer:
The molar mass of Pb(SO₄)₂ is 399.32.
Explanation:
To find the molar mass of Pb(SO₄)₂, you have to find the molar mass of each individual element that makes up the compound.
Let's start by figuring out how many of each element is present in the compound.
Pb (lead) - 1
S (sulfur) - 2
O (oxygen) - 8
(SO₄)₂ is a polyatomic ion. It is written in parentheses followed by a subscript of 2. This means that there are two sulfate ions in the compound. So, the number of sulfur atoms and oxygen atoms doubles. (1 × 2 = 2) and (4 × 2 = 8).
Next, look up the molar mass of each element on a periodic table and multiply it by the number of atoms present.
Pb - 207. 2 × 1 = 207. 2
S - 32.06 × 2 = 64.12
O - 16.00 × 8 = 128
Lastly, add up them all together to get the molar mass.
207. 2 + 64.12 + 128 = 399.32
