Hydrazine (N2H4) is made by the reaction of ammonia (NH3) with hypochlorite (OCl-). Given the following equation 420 kg of ammonia is reacted with…

Hydrazine (N2H4) is made by the reaction of ammonia (NH3) with hypochlorite (OCl-). Given the following equation 420 kg of ammonia is reacted with excess hypochlorite to generate 315 kg of hydrazine. What is the percent yield for this unbalanced reaction?