Question

during a lab, a student places a metal in a solution. she notices bubbles forming along the surface of the metal. which of the following best describes the change that she is observing? o she is observing a physical change; a new substance is forming with new properties. o she is observing a chemical change; a new substance is forming with new properties. o she is observing a physical change; the metal is evaporating and producing a gas.

Explanation:

A chemical change results in the formation of a new substance with new properties. A physical change like evaporation only changes the state of a substance without forming a new one.

Answer:

If a new substance with new properties is forming, she is observing a chemical change. If the metal is just evaporating and no new substance is formed, she is observing a physical change. Without more details on whether a new - substance is formed, we can't definitively choose one of the given options. But if we assume based on the options provided and the key difference between physical and chemical changes, if a new substance is forming with new properties, the answer is "She is observing a chemical change; a new substance is forming with new properties".