Question

hydrochloric acid and magnesium were placed in a flask. a stopper with a hole was placed on the flask, tubing and a gas syringe to collect a gas that was created with the change. what kind of change occurred if a gas was produced? a physical change b chemical change

Explanation:

A chemical change results in the formation of new substances. When hydrochloric acid and magnesium react to produce a gas, new chemical substances are formed. In a physical change, no new substances are created, just a change in physical state or appearance. Since a gas is produced here, it indicates a chemical reaction has occurred.

Answer:

B. Chemical change