what has changed in the atmosphere that give the rock strata the appearance of rust?(red/orange color).

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

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.

Which type of intermolecular attractions holds ammonia molecules together with other ammonia molecules?