Based on the enthalpy changes given for the reactions, which reactions are endothermic? (check all that apply) 2h2o → 2h2 + o2, δh = 484 kj c + o2 → co2, δh = -394 kj h2 + br2 → 2hbr, δh = -73 kj 2nh3 → n2 + 3h2, δh = 92 kj

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.