Which are standard functions that families are responsible for providing? stability, resources, affection, new experiences private education, social skills, shelter, love life skills, stability, resources, affection spending money, affection, love, shelter a b c or d

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?