(Solved): 2. The table below shows the composition of air breathed out after different activities. Gas Unbrea ...

2. The table below shows the composition of air breathed out after different activities. Gas Unbreathed Air Air breathed out from a person sleeping Air breathed out from a person running Nitrogen 78% 78% 78% Oxygen 21% 17% 12% Carbon dioxide 0.03% 9% Other gases 0.97% 1% 1% a) Explain why there is a difference between the amount of oxygen (%) breathed out by a person running and a person sleeping. [4 Marks] b) Explain why there is no difference between the amount of nitrogen (%) breathed out by a person running and a person sleeping. [2 marks]