Answer:
The correct answer to the following question will be Option B "8.4 mol".
Explanation:
The given values are:
Molarity of a solution = 0.021 M
Litres of solution = 400 L
Let the moles be "x".
As we know,
⇒ [tex]Molarity = \frac{Moles \ of \ solute}{Litres \ of \ solution}[/tex]
On putting the estimated values, we get
⇒ [tex]0.021=\frac{x}{400}[/tex]
On applying cross-multiplication, we get
⇒ [tex]x =0.021\times 400[/tex]
⇒ [tex]x=8.4 \ mol[/tex]
