Will mark !i don't understand this. if the density of an object is affected by its mass, then have the highest density and have the lowest density

If the density of an object is affected by its mass, then osmium will have the highest density and hydrogen will have the lowest density

Density = mass/volume or D = m/V

If we hold V constant, we can write D = km. where k = 1/V.

Thus, D ∝ m. As the mass of a fixed volume of a substance increases, the density increases.

The mass of H₂ in 1 cm³ 0.080 g. The mass of Os in 1 cm³ is 22.6 g.

However, there are substances with even higher densities. For example, the material at the centre of a neutron star is so dense that 1 cm³ of the material has a mass of 10¹² kg!

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