A system for measuring a substance level of acidity or alkalinity

The answer is a pH scale.

Explanation:

The pH of a solution is a measure of its acidity or alkalinity (base) and the  pH scale ranges from 0 to 14. Also, a pH indicator is called litmus paper ( a paper treated with natural water-soluble dye, to test how much acid or base (alkalinity) is in a solution! (hope this helps and I found this by searching it up but I tried to reword it to avoid plagarism)

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