Question

One kilogram of sea water sample contains $6mg$ of dissolved $O_2$. The concentration of $O_2$ in the sample in ppm is:

• A. $0.6$
• B. $6.0$
• C. $60.0$
• D. $16.0$

Answer 1

The correct option is B $6.0$

$1kg$ water $={10}^{6}mg$:
${10}^{6}mg$ water contains $6mg{O}_2$
$\therefore$ Concentration of $O_2$ is $6ppm$.