Magnesium combines with oxygen to form magnesium oxide. If 10.57 g of magnesium reacts completely with oxygen to form a compound with a mass of 17.53 g, then: a. The mass of oxygen in the compound is: b. The percent of magnesium in magnesium oxide is: c. The percent of oxygen in magnesium oxide is:

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.