Explain why Statutes coated with white lead on long exposure to atmosphere turn black and the original colour can be restored on treatment
with H2O2.

Its because once you go black, there's no going back

Explanation:

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