10.30mg of O _ 2 is dissolved into a liter of sea water of density...

Formula of $ppm$ is-

$ppm = \dfrac{weightofsolute}{weightofsolution} \times {10}^{6}$

$ppm = \dfrac{10.3 \times {10}^{- 3}}{1030} \times {10}^{6}$ =10

PPM is a concentration term and its full form is "parts per million" and it also can be expressed as milligrams per liter (mg/L). This measurement is the mass of a chemical or contaminate per unit volume of water.