which answer below correctly identifies the type of change and the explanation when magnesium comes into…

which answer below correctly identifies the type of change and the explanation when magnesium comes into contact with hydrochloric acid?\nphysical change because no color change occurred\nphysical change because the observation of a gas forming is evidence of a state change, which is reversible\nchemical change because a temperature change occurred, a solid disappeared, and a gas was produced\nchemical change because two substances were mixed, which always results in the formation of a new substance\ndone

which answer below correctly identifies the type of change and the explanation when magnesium comes into contact with hydrochloric acid?\nphysical change because no color change occurred\nphysical change because the observation of a gas forming is evidence of a state change, which is reversible\nchemical change because a temperature change occurred, a solid disappeared, and a gas was produced\nchemical change because two substances were mixed, which always results in the formation of a new substance\ndone

Answer

Brief Explanations:

A chemical change occurs when new substances are formed. When magnesium reacts with hydrochloric acid, a temperature change is observed, the solid magnesium disappears, and a gas (hydrogen) is produced. These are signs of a chemical reaction forming new substances. Just mixing two substances doesn't always mean a chemical change; it must result in new - substance formation. A state change (physical change) is not indicated by gas formation in this context as a chemical reaction is taking place.

Answer:

chemical change because a temperature change occurred, a solid disappeared, and a gas was produced