The Perseverance rover's MOXIE experiment produced a total of 122 grams of oxygen on Mars. At its most efficient, it generated 12 grams of the life-sustaining element every hour.

NASA's Perseverance Mars rover wraps up MOXIE oxygen-making experiment

Source: space
Source Link: https://www.space.com/perseverance-mars-rover-ends-moxie-oxygen-experiment