A student walks 2km in 30 minutes. What is the student's average speed in km/h

Air can be considered a mixture. which statement does not explain why?

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.

•hydration •dissociation •dissolving which one goes to which