A sample of solid candle wax is put into a pot on the stove. Heat energy is transferred to the wax at a constant rate by the burner on the stove. Match the segments on the graph to the correct description of what is happening to the wax. A-B

B-C

C-D

D-E

E-F

(match them)
melting
gasseous wax heating
solid wax heating
boiling
liquid wax heating

Explanation:

The temperature increases as each phase is heating. The temperature remains constant as each phase is changing to the next. The phases associated with increasing temperature are solid, liquid, gas — in that order.

A-B  solid wax heating

B-C  melting

C-D  liquid wax heating

D-E  boiling

E-F  gaseous wax heating

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