Question

Can plants produce oxygen without carbon dioxide? What is the relationship between carbon dioxide and oxygen in plants?

Answer 1

No, it can't because the photosynthesis involves different types of processes with carbon dioxide, producing oxygen as the result.
The relationship in the reaction is:
CO2 + 2H2O + photons → [CH2O] + O2 + H2O, so one molecule of carbon dioxide turns into one molecule of oxygen.

Answer 2

okay i found that it is
No, it can't because the photosynthesis involves different types of processes with carbon dioxide, producing oxygen as the result.