Question

What is the formula mass for an ionic substance with a chemical formula of BaSO4?

Answer 1

The formula mass for an ionic substance with a chemical formula of $BaSO_{4}$ is "233.327".

Explanation:

The mass number of Barium(Ba) = 137.327,

The mass number of Sulphur(S) = 32 and

The mass number of Oxygen(O) = 32

∴ The formula mass for an ionic substance with a chemical formula of $BaSO_{4}$

= 137.327 + 32  + 4 × 16

= 137.327 + 32  + 64

= 233.327

Hence, the formula mass for an ionic substance with a chemical formula of $BaSO_{4}$ is "233.327".