Question $8$

How many milligrams of sodium fluoride is contained in $3$ liters of a $6\mathrm{.}75$ ppm sodium fluoride solution?

NOTE: Write your answer as a Numeric value to $2$ DECIMAL PLACES. $[$For example, write $15\mathrm{.}22,$ not $15\mathrm{.}22$ g$]$

Your Answer: $0\mathrm{.}02$