Question

select the correct answer
to determine whether a chemical reaction has taken place, a scientist can observe the properties of substances before and after a change has occurred. which property is unique for each substance in its purest form?
a. solubility
b. color
c. temperature
d. density
e. state

Explanation:

Density is a characteristic property of a pure substance, with a specific value at given temperature and pressure, making it unique to each substance. Other options (solubility, color, temperature, state) are not unique to individual pure substances.

Answer:

D. density