Type the correct answer in the box. Round your answer to the nearest whole number. When oxygen reacts with hydrogen, it has the capacity to release 29 kilojoules of energy. Inside a fuel cell, oxygen reacts with hydrogen to produce 23 kilojoules of useful energy. The rest of the energy is lost as heat. What’s the efficiency percentage of the fuel cell?

The efficiency of the fuel cell is percent.

i had this on my unit activity, i can you if you are a plato student. are you a plato student?

i know insulin is primary but i dont know the others im sorry

explanation:

alchemy hadn't scientific methods of study, appeal to mysticism and fantasy, the knowledge of chemistry and physics were modest at that time.

alchemy was - but as new rules were discovered it either changed into chemistry or it became "unscientific".