3. A mixture of gases- oxygen, carbon dioxide and nitrogen - exerts a total pressure of 107.6 kPa. If the oxygen exerts 45.8 kPa and the carbon dioxide exerts 37.1 KPA, then what is the partial pressure of the nitrogen?

 23.7kPa

Explanation:  Given:

                     P total= Sum of partial P of all gases in the mix                  P total = PO2 +PN2 +PCO2                  107.6 = 45.8 + PN2 +37.1                    PN2= 107.6- (45.8+ 37.1)                            = 107.6- 83.1                            = 23.7kPA       Therefore  Partial pressure of Nitrogen is 23.7 kPA

The correct name for n3-ion should be azide.