2. Write word equations for these reactions: (a) Sugar breaks down into carbon and water,
(b) Iron, water, and oxygen produce rust.
(c) Carbonic acid breaks down

Explanation:

glucose -> carbon + water

iron + water + oxygen -> iron oxide

carbonic acid -> carbon dioxide + water

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

that's what i got you can count the number of atoms