Nitrogen monoxide is one of the main components of smog, and can be produced in a number of ways, including the reaction below: 4NH3(g)+5O2(g)→4NO(g)+6H2O(g)
If 22.0L of ammonia reacts with 32.0g of oxygen at SATP, what mass of nitrogen monoxide will be produced?

It is false that during exercise, the oxygen concentration in the blood increases to twice that of resting levels. As a matter of fact, the oxygen either stays the same or decreases, or it may increase slightly than it used to be when the person was resting, but it definitely does not double while exercising. Hope this helps. Let me know if you need additional help!