How many moles of oxgen are in one mole of calcium carbonate?

Answer 1

1 mol CaCO3 x (3 mols O atoms/1 mol CaCO3) = 3 mols O atoms.

Answer 2

plz explain in detail

Answer 3

What is it you don't understand? Look at the formula for CaCO3. For every 1 mole of CaCO3 you start with you have 1 mol Ca atoms, 1 mol C atoms and
3 mols O atoms.