Tube worms that survive near geothermal vents of hydrogen sulfide rely on bacteria living inside them to obtain energy by the oxidation of H 2S to SO 4 2-. What is the overall change in the oxidation number of sulfur for this reaction?

The overall change in the oxidation number of sulfur is 8.

Explanation:

Oxidation number is defined number assigned to an element in reaction which represent the loss or gain of electrons by an atom of an element in a compound.

In

let the oxidation number of S in hydrogen sulfide be x.

x = -2

In

let the oxidation number of S in sulfate ion be x.

x = -2 + 8 = +6

The overall change in the oxidation number of sulfur :

= [+6] - [-2] = 8

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .