During chemistry lab, Carl and his lab partner, Mary, mixed four halide salts, one at a time, with silver nitrate. Mary commented that all but one salt reacted chemically with the silver nitrate. Carl asked her how she knew that a chemical reaction had occurred. What was Mary's response based on evidence in this activity?

idk

explanation:

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance