A compoud which can be used in space vehicles both to absorb `CO_(2)` and liberate `O_(2)` is:

A compoud which can be used in space vehicles both to absorb `CO_(2)` and liberate `O_(2)` is:
A compoud which can be used in space vehicles both to absorb `CO_(2)` and liberate `O_(2)` is:
A compoud which can be used in space vehicles both to absorb `CO_(2)` and liberate `O_(2)` is:
A compoud which can be used in space vehicles both to absorb `CO_(2)` and liberate `O_(2)` is:

`O_(2)`