Question

0.001 % w/w fluorine present in water calculate the PPM PPB concentration of flourine .... ​

Answer 1

0.001 % w/w fluorine means 0.001 g of flourine in 100g if solution

Mass of solute=0.001g

Mass of solution =100g

PPB

=Mass of solute/Mass of solution×10^9

=0.001×10^7

=10^4

PPM=PPB/1000

PPM=10

I hope this helps ( ╹▽╹ )