Which reaction is endothermic?
2brcl mc019-1.jpg br2 + cl2 + 29.3 kj
2h2 + o2 mc019-2.jpg 2h2o + 572 kj
c + o2 mc019-3.jpg co2 + 394 kj
n2o4 + 59 kj mc019-4.jpg 2no2

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.