When does the dipole arrow point to Atom A? (Use electronegativity in your explanation)

Dipole, less electronegativity,  higher electronegativity

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume