How many moles of electrons are required for denitrifying organism to reduce 78 moles of nitrate to dinitrogen gas?

780 moles e⁻

Explanation:

N⁺⁵ in NO₃⁻ requires 2(5e⁻)  => 1/2 mole N₂(g)

That is, NO₃⁻ + 2(5e⁻/mole N₂ formed) => 1/2N₂

NO₃⁻ + 10e⁻/mole N₂ formed => 1/2N₂

∴ 78 mole NO₃⁻ requires 780 moles e⁻  => 1/2(78) moles N₂ = 39 moles N₂

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 .

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements