Answer:
60.88%
Explanation:
The formula for cerium carbonate is Ce₂(CO₃)₃.
Let's assume we have 1 mol of cerium carbonate. The total mass would be equal to the molar mass of Ce₂(CO₃)₃, 460.25 g/mol.
Out of those 460.25 g, the mass corresponding to cerium would be:
- 2 * Molar mass of Ce = 2 * 140.11 g/mol = 280.22 g
Now we can calculate the percentage by mass of cerium:
- % mass = 280.22 / 460.25 * 100% = 60.88%
