What are the uses of oxygen?

Question

Uses of oxygen

Answer 1

For combustion
       Breathing
      Is mixed with hexane and        use with mountain               climbers

Answer 2

Breathing, germination 

Answer 3

Used in hospitals with patients having breathing difficulty
Used together with hydrogen to cut metals.
Used in welding 

Answer 4

For respiration
For photosynthesis

Answer 5

Germination ,gaseous exchange, burnig ,rusting.

Answer 6

Germination,combustion/rusting,in breathing

Answer 7

Germination
Combustion
Rusting
Breathing

Answer 8

Combustion, germination,

Answer 9

Use for combustion
When mixed with helium is used by mountain climbers and deep Sea divers

Answer 10

Used in hospitals