* We need specific compounds. "Compound containing calcium and oxygen" could be calcium oxide (CaO), calcium hydroxide (Ca(OH)₂), or others. The same goes for sulfur compounds.
* Mass depends on the amount. Even the same compound will have different masses depending on how much of it you have.
To compare mass, we need to know the specific compounds and their amounts.
For example:
* Calcium oxide (CaO) vs. Sulfur dioxide (SO₂)
* If you have 1 mole of each, CaO has a higher mass (56 g/mol) than SO₂ (64 g/mol).
* Calcium hydroxide (Ca(OH)₂) vs. Sulfur trioxide (SO₃)
* If you have 1 mole of each, Ca(OH)₂ has a lower mass (74 g/mol) than SO₃ (80 g/mol).
Let me know the specific compounds you're comparing, and I can tell you which has a higher mass.
