Sodium bicarbonate is the chemical name for baking powder. its chemical formula is nahco3. what does the subscript 3 mean?

 subscript 3 mean 3 oxygen atoms

Explanation:  NaHCO3 is an ionic compound which when dissolved in water gets dissociated into its constituent ions that are Na+ and HCO3- .

Thus the subscript 3 explains the number of oxygen that are attached to the carbon in the hydrogen carbonate ion.

The structure of the following is given below -

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 .