What will happen if the oxygen present in the rocket will get finish (rocket is in the space)?

If the oxygen in a rocket running in space runs out, the crew will face life-threatening conditions. They will be unable to breathe, leading to unconsciousness and potential death within minutes due to hypoxia. Additionally, the spacecraft's systems that rely on oxygen, such as life support and combustion processes, would fail, jeopardizing the mission and the safety of the astronauts. Immediate action would be necessary to find an alternative oxygen source or return to a safe environment.