Answer:
C) The densities of the samples are different, so a chemical reaction has occurred.
Explanation:
Given,
The volume of the sample A, v = 45 cm³
The mass of the sample A, m = 0.5 g
The volume of the sample B, v = 65 cm³
The mass of the sample B, m = 1.3 g
To find the whether there is a chemical reaction has occurred, first to examine the physical properties of the samples.
The color of the samples remains the same. This will not lead to valid result. The scientist need to examine further.
Next level is to check the densities of the substance.
The density of the Sample A
ρₐ = 0.5/45
= 0.011 g/cm³
The density of sample B
ρₓ = 1.3/65
= 0.02 g/cm³
On analyzing the densities of the samples, sample A is less denser than sample B.
Hence, a chemical reaction has occurred.
