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How many minutes an adult would survive with the oxygen produced?
Article says: “Since then, MOXIE has generated 122 grams of oxygen, equal to what a small dog breathes in 10 hours, according to NASA.” I guess the exercise is left to the reader for the small dog:human ratio.
You need to ~2 grams a minute. So, about an hour.
More importantly, "During the peak of its efficiency, MOXIE produced 12 grams of oxygen an hour at 98% purity or better." I don't know what the requirements for peak efficiency are, but in theory it could sustain 6 people indefinitely if that could be sustained.