Question

Sea water contains $5.8\times {10}^{-3}$ g of dissolved oxygen per kilogram. The concentration of oxygen in parts per million is

• A. 5.80 ppm
• B. 58.5 ppm
• C. 0.58 ppm
• D. 0.05 ppm

Answer 1

The correct option is A 5.80 ppm

$ppmof{O}_2=\frac{\text{weight of component (g)}}{\text{total weight of solution (g)}}\times {10}^6$
ppm of $O_2$$=\frac{5.8\times {10}^{-3}}{1000}\times {10}^6=5.8ppm$