Question

Which observation provides information about the chemical properties of a substance?

1- The substance is a liquid at 25C.
2- The substance has a density of 2.50 g/cm3. 3- The substance burns brightly in air.
4- The substance will not dissolve in water.​

Answer 1

3- The substance burns brightly in air.

Step-by-step explanation:

The substances which burn in air are called combustible. Oxygen (in air) is essential for combustion. During the process of combustion, heat and light are given out. Ignition temperature is the lowest temperature at which a combustible substance catches fire.

Answer 2

3

Step-by-step explanation:

Burning brightly in air is a very specific effect which only certain chemical makeups are able to produce.