Please i have an exam monday and i dont know how to answer it help. ( A 250.0-mL aqueous solution contains 45.1 mg of a pesticide Express the pesticide's concentration in weight percent, parts per million, and parts per billion.)

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

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