Certain species of fish are unsafe to consume in high quantities because these fish a. are endangered species
b. have high levels of metals in them from cancer- causing pesticides
c. ingest other fish that are poisonous to humans
d. contain vitamins that aren't water-soluble and can cause toxicity

Write a paragraph that provides examples of each stage of volcanic activity, a description of the volcano, and facts about each stage.

Use the drop-down menus to answer each question. which runner finished the 100 m race in the least amount of time? which runner stopped running for a few seconds during the race? at what distance did anastasia overtake chloe in the race?

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .