When a strip of zinc metal is added to a test tube of hydrochloric acid, the liquid forms bubbles, and the test tube feels hot. The bubbles are a result of the formation of hydrogen gas. What does the hot test tube indicate?

Exothermic Reaction

Explanation:

The test tube feels hot as a result of an increase in temperature of the surroundings. This means that due to the reaction between zinc metal and hydrochloric acid, heat was released. The hot test tube indicates that this is an exothermic reaction.

explanation: no but i do not usually comment

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