Suppose a small river with a population of 10,000 frogs becomes polluted with cadmium to a level of 3 mg per gallon per day. About how many bullfrogs would be expected to die?

3000 bullfrogs

Explanation:

Check the graph attached below for more details on the bullfrogs that will die if 3 mg per gallon per day of cadmium was added to the small river having population of 10000 frogs.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.