Oxygen is released as a waste product by plants during the process of animals takes in this oxygen and releases it as during the process of

Oxygen is released as a waste product by plants during the process of photosynthesis. Animals takes in this oxygen and releases it as carbon dioxide during the process of respiration. I hope that this is the answer that you were looking for and the answer has actually come to your desired help.

1- 4 Na + O2 —> 2 Na2O
2 - 4H2 +2O2 —-> 4H2O
3- Na2SO4 + CaCl2 —> CaSO4 + 2NaCl
4- 2Al2O3–> 4Al+ 3O2
5- N2 +3 H2–> 2 NH3
6- 3Fe +4 H20–> Fe3O4 + 4H2
I’m having trouble reading the last ones .