Given [h3o+] = 9.89 x 10-3m find: [oh-] and ph is this acidic, basic or neutral?

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

the answer would be a

you need to have a picture of the atom that way we can answer it