Question

Concentration $1$ ppm $=$ ${10}^x$ ppb. Then, the value of $x$ is :

Answer 1

ppm and ppb are defined as:

$1$ ppm $=$ $1/{10}^6={10}^{-6}$

$1$ ppb $=$ $1/{10}^9={10}^{-9}$

So, $1$ ppm $=$ $1000$ ppb