Question

Fish need about 5 ppm oxygen dissolved in water to survive. Will water with 5 mg oxygen per

liter sustain the fish?

Answer 1

5mg in liter is 5 ppm

Explanation: 1 ppm is one part per million.

1 ppm is 1 mg is one part of million from 1 kg = 1000 000 mg

1 litre water is 1. Kg.