The following chemical equation represents the reaction that occurs when an iron nail is combined with oxygen. 4Fe + 3O2 → 2Fe2O3

How many different types of atoms are involved in this reaction?
A. 2
B. 3
C. 4
D. 5

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them