Asample of a certain material has a mass of 2.03 x 10-3 g. calculate the volume of the sample, given the density is 9.133 x 10-1 g/cm3.

Mass of a sample = M = 2.03 x 10-3 g

Density of a sample = D = 9.133 x 10-1 g/cm3

Volume of the sample = ?

By using the formula = D = M / V

V = M / D

Putting the values of density and mass of the sample

V = 0.00203/0.9133 = 0.0022cm3

V = 0.0022 cm3

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

i believe the answer is true.