ASAP Please Help

The rate of photosynthesis can be measured as the volume of oxygen released by a
plant per minute. The number of bubbles of gas released per minute from waterweed is
counted.

a. The gas collected in this experiment is not pure oxygen. Suggest a reason for this.

ASAP Please Help The rate of photosynthesis can be measured as the volume of oxygen released by a plant per minute The number of bubbles of gas released per min class=